Another loopy murderer who references Dexter

I was half watching a TV show about teenage killers last night, when they went into a lot of detail about a fairly recent example from South Australia.  I hadn't heard of this case at all, but the teenager killed his girlfriend, and an unfortunate woman who just happened to be in the wrong place, with an axe.  His comment to the police was widely reported:  "I wouldn't make a very good Dexter."

OK, so he wasn't claiming inspiration from the show.   Still, I'm going to add this case to the list I produced in October 2012 as to the number of murderers who were keen on the show.  (And repeat my very reasonable argument that people should regret that it was made at all.)

An appalling creep, and freedom of speech

Suicide voyeur William Melchert-Dinkel, who posed as a female nurse and went by the name 'Falcon Girl', has case overturned

He was found guilty of aiding the suicide of Mark Dryborough, 32, who died
in Coventry, UK, in 2005, and of Nadia Kajouji, 18, who took her own
life in 2008.

In the original trial, the court was told that Mr Melchert-Dinkel, who is
married with two children, posed online as a compassionate female nurse
to prey on depressed individuals, but then gave them advice on how to
suicide.

He allegedly told police that he acted for the ‘‘thrill of the chase’’ and
wanted to watch his targets die via a computer webcam.

But in a ruling eagerly awaited across the United States by both sides in
the assisted suicide debate, the state supreme court has ruled that a
state law prohibiting ‘‘advising’’ and ‘‘encouraging’’ suicide broke the
constitution by restricting freedom of speech.

However, it upheld the part of the statute that outlaws ‘‘assisting’’ suicide
and sent Mr Melchert-Dinkel’s case back to a lower court.

County prosecutors must now decide whether to appeal against the ruling in the
US Supreme Court or to bring fresh charges against Mr Melchert-Dinkel
for assisting suicide.

It's another example of why I don't care for the American approach to rights.

Talk about your dubious studies destined for tabloid attention

I don't even want to put the headline here, but it's to do with men, sport and locker rooms.  You can guess the rest.

About Tim, revised

Has anyone noticed the website for blowhard hypocrital self-promoting socialite Human Rights Commissioner Tim Wilson lately?  Here's his discription:

Tim Wilson is Australia’s Human Rights Commissioner and a classical liberal public policy analyst. He is one of Australia’s most challenging opinion leaders drawing on strong philosophical principles, backed up with evidence while maintaining a real-world edge. Passionate. Controversial. Fearless. He’s not afraid to be outspoken in offering an optimistic solutions-focused perspective on local and international issues that gets people engaging and talking.

 Timbo, I think there is an important "an" missing from that first line, which should open like this:

Tim Wilson is an Australian Human Rights Commissioner.

Does he write this self congratulatory stuff personally?  Perhaps not.  At the bottom of the website:

 Mr Wilson is represented by Shaun Levin from Profile Talent Management, +61(0)3 8598 7808 or slevin@profiletalent.com.au.

On his $300,000 plus salary, paid by an organisation he wanted disbanded until a political pal offered him a job there, does he still need really need an agent?   I think I might be emailing him with a requested correction to the profile, together with this proposed replacement photo:

I always wanted a dungeon

One of the sites I found via using Zite is medievalists.net, which has always quite a few interesting articles.

I see they have a post about an English castle that's gone on sale for 3 million pounds, complete with moat and dungeon.  

It looks more window filled than I expect a castle to be.  But then again, I am not entirely sure what makes a castle a castle.  I see from Wikipedia:

Scholars debate the scope of the word castle, but usually consider it to be the private fortified residence of a lord or noble. This is distinct from a palace, which is not fortified; from a fortress, which was not always a residence for nobility; and from a fortified settlement, which was a public defence – though there are many similarities among these types of construction. Usage of the term has varied over time and has been applied to structures as diverse as hill forts and country houses.

I guess just having a moat counts as a fortification, then.

I never thought that Castle Howard, as used in the TV version of Brideshead Revisited looked like a castle either, and Wikipedia informs me I was right to be skeptical:

Castle Howard is not a true castle, but this term is often used for English country houses constructed after the castle-building era (c.1500) and not intended for a military function.

Actually, I always thought it looked too grandiose compared to what was mentioned in the book.  Sure the family was supposed to be rich, but that rich?  

Anyway, glad we've sorted that out....

Oceans going down

I see that Oceanography has a special issue out about changes to ocean chemistry, which means in large part it's about ocean acidification.

I think all of the articles are available as .pdfs, so I won't bother linking to individual ones.

But having a look at a couple of them, the take away messages are:

*  the oceans at all parts of the world are showing declining pH dues to increase CO2 in line with predictions

*  coastal oxygen free "dead zones" are increasing and are likely to continue increasing with warming temperatures.  (This has been predicted for some time too.)

I don't do many posts about ocean acidification lately, but looking through the Ocean Acidification blog, there is plenty of research still going on, much of it with worrying results.  It seems to be a frequent theme that both oysters and scallop growing areas in North America are already suffering due to coast water acidification.  Although there is a natural variation to pH in those areas anyway, the slow increase in surface acidification is obviously not helping.

Many studies look at developmental and behavioural changes displayed by various species under decreased pH, but it is obviously very difficult to work out how they will play out in the future oceans.   Some species indicate some adaptive ability, but the big picture is enormously hard to predict.

I still think the pteropods are like the canary in the coal mine on this issue.  A study in 2012, which was looking at pteropods taken in 2008, found that those in aragonite undersaturated waters were showing severe shell erosion already.    A future collapse in this extensive species which feeds many of the sort of fish we like to eat could be dire. 

So, for all of the talk of lower rates of temperature rise and when that will turn around, this is the issue that climate change deniers larger ignore or simply dismiss as another scientific disaster story told to ensure funding. 

They are ignorant and dangerous to the future of humanity.

More Renaissance

Further to my recent post about the Renaissance, this BBC article about the codpiece fashion of the time is quite amusing.  (You have to watch the video to understand properly what they are talking about.) 

Can Andrew take a hint?

I see Andrew Bolt today notes everything about the Marcia Langton "racist" allegation except the story in The Australia where the one aboriginal activist who he doesn't have a problem with (at least since he started to criticize Labor and defected into the Abbott camp) tries to tell him to stop going on about colour and race:

“I know Andrew Bolt personally,” Mr Mundine said. “I don’t believe he is a racist. Having said that, I find it strange that he continues to talk about colour, and talks about race. I find that bizarre.
“To me he does not have an understanding of the complexity and structures of indigenous kinship and I think he needs a little more education in that area.”

I also note that in defending Mundine last year, Bolt didn't just label one Left wing person as "racist", but the entire political category:

  The Left tends to see racists everywhere. That’s the thing with mirrors.

It makes his drama queen act over Langton all the more ludicrous. 

Low flying dreams

The Flight 370 story, with the parts about it flying low during certain sections, either deliberately or accidentally, reminds me about the recurring "low flying" dreams that I have had in recent years.

Although it seems a while since I had one, I have over the past years had dreams in which I am on a passenger jet, looking out the window and realizing we are flying really low for no apparent reason.   Sort of so low we are going up and down to get over hills.  No one else on the plane seems to have noticed.  I find it scary.

I have not been able to identify why this should be a recurring theme in my dreams.  I was interested to see in New Zealand a few years ago a smallish passenger jet flying through a valley on the approach to Queenstown airport.  I thought I wouldn't like the look of that if I were in the plane.  But was that enough to bring on a recurring dream?  I also think I might have had my first "low flying dream" before then.  They have turned up now and again for quite a long time.

That is all.

Against the Bolt and the Abbott

Hypocrisy adds insult to injuries

It's taken a while for someone to make this observation about the Kenny defamation case, but here it is in Richard Acklands enjoyable article ripping into Andrew Bolt and his demands for apologies:

Maybe Aunty's lawyers wanted to avoid another round of bullying from the government and News Corp.

Already it has the prime minister's dinner guest and Murdoch
pen-man Chris Kenny on its schedule of defamation cases, with Tony
Abbott saying the ABC should not be ''defending the indefensible''.

''Next time the ABC comes to the government looking for more
money, this is the kind of thing we would want to ask them questions
about,'' he said.

If ever there was a blatant contempt of court, this is it -
threatening a litigant with a monetary penalty if it defends itself in
civil litigation. George Brandis must have forgotten the Wran case in
which the former premier was found guilty of contempt for encouraging
the second jury in the Lionel Murphy case to find the High Court judge
not guilty.

Things we're learning from Flight 370

The mystery of this missing flight has certainly led to a lot of interesting explanations about aviation and other topics: even, of all things, anthropology.

1. Take a look at this article from Slate: How the Malaysian Airlines Plane Could Have Landed in the Stone Age. Who knew there was an island in the Indian Ocean with an African looking naked tribe which apparently aggressively fights off anyone who wants to visit them?:

From 1967 through the mid-1990s, Indian anthropologists embarked on periodic "contact expeditions" to North Sentinel Island. Approaching by boat, they attempted to coax out members of the tribe by depositing coconuts, machetes, candy, and, once, a tethered pig onto the beach. The Sentinelese almost always responded to these "gifts" by shooting arrows, throwing stones, and shouting at the unwelcome visitors. India discontinued its attempts at peaceful contact in 1997 and ruled that the islanders be left alone, but visits still occur — in 2006, a fishing boat drifted too close to the shore, and Sentinelese archers killed the two men on board. An Indian helicopter sent to retrieve their bodies was also fired upon and could not land.

That is a very strange story.  It's like discovering that King Kong Island still exists in the 21st century.

2. Slate also explains the limitations of being able to use mobile phones in an emergency in an aircraft. I had wondered about how they had been used in 9/11. Now I know.

3.   The BBC gives a pretty easily followed explanation of how aircraft are tracked.  

Tougher than expected

Frozen moss buried in Antarctica for more than 1,500 years starting to grow again in laboratory - Science - News - The Independent

Nietzsche considered

New Statesman | The ghost at the atheist feast: was Nietzsche right about religion?

Jason, have you already read this review?  It's interesting.

I can never quite work out why Nietzsche is popular.  I see that John Gray in this review says Nietzsche was not, ultimately, taking a tragic view of life.  I don't know enough about him to work out if this makes sense or not, but here's the key argument:

...neither the Christian religion nor Nietzsche’s philosophy can be said to express a tragic sense of life. If Yeshua (the Jewish prophet later known as Jesus) had died on the cross and stayed dead, that would have been a tragedy. In the Christian story, however, he was resurrected and came back into the world. Possibly this is why Dante’s great poem wasn’t called The Divine Tragedy. In the sense in which it was understood by the ancients, tragedy implies necessity and unalterable finality. According to Christianity, on the other hand, there is nothing that cannot be redeemed by divine grace and even death can be annulled.

Nor was Nietzsche, at bottom, a tragic thinker. His early work contained a profound interrogation of liberal rationalism, a modern view of things that contains no tragedies, only unfortunate mistakes and inspirational learning experiences. Against this banal creed, Nietzsche wanted to revive the tragic world-view of the ancient Greeks. But that world-view makes sense only if much that is important in life is fated. As understood in Greek religion and drama, tragedy requires a conflict of values that cannot be revoked by any act of will; in the mythology that Nietzsche concocted in his later writings, however, the godlike Superman, creating and destroying values as he pleases, can dissolve and nullify any tragic conflict.

As Eagleton puts it, “The autonomous, self-determining Superman is yet another piece of counterfeit theology.” Aiming to save the sense of tragedy, Nietzsche ended up producing another anti-tragic faith: a hyperbolic version of humanism.

Oh yes, wouldn't the Right love this

Here's an interesting short article on why Finland seems to have such a successful education system.

It paints a picture of educational philosophy that is, for the most part,  the complete opposite of what our current Right wing commentariate thinks about education:  an intense commitment to equality to access to education up to and including tertiary education; teachers who are very highly paid and very highly educated (masters degrees!) in how to teach, a national curriculum, small class sizes, and my favourite part for making the Judith Sloans of the world shake their heads in disgust:

School should be where we teach the meaning of life; where kids learn they are needed; where they can learn community skills. We like to think that school is also important for developing a good self-image, a strong sensitivity to other people’s feelings … and understanding it matters to take care of others. We definitely want to incorporate all those things in education.

Gee, I wonder what they teach about global warming and environmentalism?   All of the readers of Catallaxy would rather home school than put them through the Finnish system, I expect. (Several of them like the idea of home schooling in Australia because our education systems dares teach accurately on environmental topics, and tolerance of gays.)  I wonder if home schooling is illegal in Finland?

About the only thing the stoopid Right would like is a high emphasis on vocational training. 

Renaissance nudity

I happened to catch some of  Radio National's The Body Sphere today, and the section in which an Italian Renaissance art historian [Jill Burke] discussed attitudes to nudity at that time was particularly interesting, and amusing.   Here are some things of which I was not fully aware:

There's a kind of golden age of acceptance of the nude in art in Florence in the 1480s when Botticelli's painting his Venuses and these get very popular. Then there's a big swing, a big kind of religious turn in the 1490s, when some of these nude drawings, nude paintings are burned. The Bonfire of the Vanities in 1497, 1498 in the Piazza della Signoria just where the David was later to be displayed. And the David itself when it was first put up in Florence, he had a little kind of garland of leaves to cover his private parts. So even though you might think that it was all very acceptable, it was always a little bit problematic because of the potential of art to arouse erotic feelings in the viewer.

Burke then comments that as for public nudity, some males doing certain types of work might be seen nearly naked; but as for women, it was all very taboo, unless they needed to be punished:

They'd also have these kind of shaming rituals in some Italian cities where women who'd been caught for adultery would have to run round the city with no clothes on being pelted by vegetables, that kind of thing. But actually for what you might call respectable women, it would be shocking to see women naked.

Even bedroom activities were the subject of anti-nudity instruction:

They were told to have sex with their clothes on. There's a lot of religious texts and sermons that talk about women never allowing their husbands to see them naked. So, there's a Franciscan preacher called Bernardino Siena who in the early 15th century said to women in a sermon, 'It's better to die than let yourself be seen naked.' And that was by husbands, not in public. And there are other handbooks for married life. There's one by a man called Cherubino da Siena, again early 15th century, that tells both men and women that they shouldn't see each other naked, that's it's okay to touch areas but it's not okay to see them. So it's that kind of thing; on an official level no, they weren't meant to have sex naked, but what they actually did…I suspect that they really did have sex naked.

And as for the use to which what we might now consider "high brow" nude art was put; well, the erotic potential was not lost on its owners:

Jill Burke: From what we know, the evidence that we have from inventories is that these paintings would have been kept in the bed chamber. Often they were covered in some way, either with curtains…or there's another kind of nude that's very early, actually, that was on the underside of the lids of wedding chests…

Amanda Smith: The cassone…

Jill Burke: Cassoni, yes, that you'd keep clothes and things in. And you'd lift the lid and there's a reclining nude. Often they'd come in pairs and there'd be a naked man on one side and a naked woman on the other side. Again, whether this kind of almost taboo nature…you can imagine opening a chest or pulling aside a curtain might raise the erotic charge of these paintings.

Amanda Smith: But having that sort of naked image on the inside lid of a cassoni, for example, I mean was that to get the bride fired up as she, you know, pulled out her nightie?

Jill Burke: I think it probably was, yes, to get the couple kind of 'in the mood'. There's also a belief in the Renaissance that if you look at pictures of beautiful men that you're more likely to conceive a beautiful boy baby. So there's almost this kind of magic thing attached to it.

Burke's segment was too short.  But there is more at the transcript on the website.

A couple of Krugmans

Paul Krugman has two posts of interest up:

*  one about worries about private debt in China.

* the other is about increases in life expectancy in the US being not all that it seems.  I assume he won't object to my reproducing it in full:

I was pleased to see this article by Annie Lowrey documenting the growing disparity in life expectancy between the haves and the have-nots. It’s kind of frustrating, however, that this is apparently coming as news not just to many readers but to many policymakers and pundits. Many of us have been trying for years to get this point across — to point out that when people call for raising the Social Security and Medicare ages, they’re basically saying that janitors must keep working because corporate lawyers are living longer. Yet it never seems to sink in.

Maybe this article will change that. But my guess is that in a week or two we will once again hear a supposed wise man saying that we need to raise the retirement age to 67 because of higher life expectancy, unaware that (a) life expectancy hasn’t risen much for half of workers (b) we’ve already raised the retirement age to 67.

I wonder whether the Australian increase in life expectancy is more evenly spread across income levels.   Given our system of health care, you would certainly expect so.   (But of course there is a big disparity between aboriginal and non aboriginal life expectancies, even though I don't think that is something that is relevant to the Krugman argument.) 

Two odd thoughts on Flight 370

1.   Someone somewhere on the internet has probably already said it, but the situation as it has developed keeps striking me as something very like the opening of a James Bond film.   Sure, it's usually military or similar items being snatched or destroyed by an evil genius who does not make his plans public, but close enough. [Update:  Ah yes, I see today that James Fallows in The Atlantic perhaps made the James Bond connection a couple of days ago.]

2.   The discussion about the relative paucity of radar cover across the globe indicates that there may be more room for UFOs of the nuts and bolts variety to be cruising around the Earth than I would have thought.  Radar sightings of UFOs are pretty sparse; visual/radar sightings even more so.  There is the occasional muttering around that NORAD has had radar tracks of pretty inexplicable things (very fast objects doing very fast turns, for example) but I don't know at what height and perimeter it can be expected to see things.  It certainly appears that there is plenty of space over plenty of parts of the globe that something could sneak in if it did not want to be detected.

Needs better drawings

Death Is Wrong, the transhumanist kids’ book by Gennady Stolyarov.

Slate has a look at a book for kids promoting transhumanism. 

If the cover is anything to go by, the author could not afford a good illustrator. 

To Canberra and Back, Part 7

We're on the last legs now.  From Jenolan Caves we headed up north to Taree, via Katoomba:

I don't know when I was last in Katoomba - perhaps I had been there briefly once as an adult, but I think I may have just driven through on the way to my adult visit to Jenolan Caves.  I wanted to show the family the famous view, but even at midday, this was all that you could see:

  

 

I was reduced to going into the souvenir shops and pointing to postcards and saying to slightly skeptical family that it really looked spectacular if it weren't for the cloud:

(Apologies to Australian readers who didn't really need the illustration.)

I felt sorry for the busloads of Chinese tourists who being delivered to stare into the fog for a few minutes, before being shuffled into what looked like a lacklustre cultural show featuring suburban people of aboriginal descent.  (I'll slip into slight condescension mode and mention again that an interest in Australian aboriginal culture, no matter how it is presented, is something which still eludes me, and I really have my doubts it interests the average Chinese tourist either.)

Anyway, on we drove, descending out of the Blue Mountains and skirting Sydney as we hit the road north.  Lunch was at a McDonalds. 

I've always liked the motorway north out of Sydney to Newcastle; the way it carves through some hills and the high bridges over which (unfortunately) the driver only gets a brief scenic glance.

And in fact the road right through to Taree was pretty good most of the way.  

Taree was chosen to overnight just because of its distance.  It seemed a pretty nondescript town; I prefer some of the more northern big river towns of New South Wales.  More about them later.

A serious problem

Given that the last month in Australian media has been full of appalling stories of pedophilia (apart from the Morecombe case itself, there are the terrible allegations from several women about - alleged - comic actor Robert Hughes, and the extraordinary case of the Cairns based gay couple who acquired a baby with the explicit purpose in mind,)  I thought I would look around for recent commentary on the whole issue of pedophilia and recidivism.

This one from Harvard Medical School in 2010 is pretty good.  The problem is, as the title says, there is pretty widespread pessimism about how it can be treated with any sufficient degree of certainty that you can prevent recidivism.   This is a real nightmare for those in the justice system, and the community more generally. 

Look at Cowan himself.  After serving 4 years for a second rape of a boy, and being sent by his parole office in Darwin to Queensland so that could do a sexual offenders program, he apparently got into an evangelical Church and met his wife there, with whom he had two children (one before he killed Daniel, one after.)  He certainly looks clean cut and reformed in this street interview in Brisbane in which he proclaimed he was a new man.  For any psychologist dealing with him, this must have sounded like the best possible type of support group to help ensure he did not re-offend.  Yet the urge to sexually assault boy strangers was strong enough that he acted on it.

The thing is, what confidence should the public have in sexual offender programs delivered through the justice system?   The Harvard article above notes this about recidivism:

Estimates of recidivism vary because studies define this term in different ways. One review found recidivism rates of 10% to 50% among pedophiles previously convicted of sexual abuse, although this could include anything from an arrest for any offense to reconviction on a crime against a child. One long-term study of previously convicted pedophiles (with an average follow-up of 25 years) found that one-fourth of heterosexual pedophiles and one-half of homosexual or bisexual pedophiles went on to commit another sexual offense against children.

This would indicate the recidivism rate for someone like Cowan is extraordinarily high, and his case is far from atypical.

Are judges kept fully aware of the research on the topic?

And what about the style of treatment and its efficacy that is attempted in the sexual offender programs in Australia?   I see there is a 2010 Queensland study on the sexual offender program, but it is only for about 409 released from 2005 to 2008 - a pretty small sample size over a very short period.  (The report acknowledges these shortcomings;  it also notes that for offences against children, there is often a substantial delay before the offence is reported.)

The report finds that the program seems to have a positive effect (in that those who did the program have a somewhat lower recidivism rate for sexual offences), but obviously the study is looking at a very short period.    The parts that discuss sexual offence recidivism rates generally are of interest. On the "down" side:

Despite a great deal of research effort devoted to the question, knowledge concerning the dynamic risk factors associated with sexual offender recidivism (otherwise referred to as criminogenic needs) remains limited. Some of the psychological characteristics commonly targeted for improvement in sexual offender programs (e.g. sexual preoccupations; impulsivity; intimacy problems) tend to be only weakly (even if significantly in a statistical sense) associated with sexual offender recidivism. Other common treatment targets (e.g. denial; victim empathy) have recently been shown, on average, to be unrelated to sexual offender recidivism (Hanson & Morton-Bourgon, 2005).

 On the (slightly) more positive side:

A meta-analytic review of sexual offender recidivism studies, involving more than 80 separate studies and almost 30,000 sexual offenders, found an average sexual recidivism rate of 13.7% over an average time at risk of five to six years (Hanson & Morton-Bourgon, 2005). In that meta-analysis, rates for nonsexual violent recidivism were 14.3%, and for ‘any’ recidivism 36.2%. For the present evaluation, the average time at risk of two years and five months was a little less than half the average observation period for the studies included in Hanson and Morton-Bourgon’s meta-analysis. Notwithstanding jurisdictional variations in crime reporting.  and recording, it would be reasonable to expect that over the next two or three years observed recidivism base-rates for the Queensland offenders would be more similar to international averages.

But what about for longer periods?   This passage seems to me to be written with unwarranted optimism, given the number quoted:

Notwithstanding the limitations of official recidivism data, it seems clear that a significant proportion (perhaps the majority) of convicted sexual offenders do not go on to commit further sexual offences, even without treatment. Studies that have followed sexual offenders for 20 years or more still tend to find sexual recidivism rates well below 50% (Hanson, 2000; Janus & Meehl, 1997). This raises further questions about the universal need for specialised sexual offender treatment.    

What's missing, of course, is more specific figures for the rate of pedophiliac recidivism.

From reading the Harvard commentary, and this Queensland report with its hesitation about how effective these programs really are, it would seem reasonable to conclude  that the rate of recidivism for pedophiles is significantly higher than for sexual offenders against adults, and is very likely to stay that way even if they undergo a sexual offender course.

More pessimism can be taken from the psychologist who actually treated Cowan.   While he considers sexual offender programs do help (and while ever they have some effectiveness, I wouldn't argue against them - except to the extent that they may give unwarranted confidence to judges when sentencing,) he freely admits you can never really know if someone will re-offend:

He says evidence suggests such programs are effective when they are "well designed and well implemented".

"But there are never any guarantees for individuals, and when you're dealing with high-risk offenders in the first place there's bound to be some recidivism among that group," he said.

"The difficulty is predicting who among that group is and isn't likely to go on to commit further offences."

He says sex offenders often display no observable behavioural features apart from the offences they commit.

"In fact for many sex offenders, the most unusual thing about them is that they have committed sex offences," he said.

"We know that in retrospect, but it's obviously very difficult to know in prospect."

It seems to me that if the long term recidivism rate for guys like Cowan is around 50%, and if sexual offender programs have only ever been shown to have modest effects (say, reducing re-offense by pedophiles to 40%?) this is a really significant matter which must be taken into account in terms of how both sentencing and the terms on which they should ever be released back into the community.

(If any psychologist thinks my guesstimate figures in that paragraph are  wrong - let them come out and be specific about what figures they know about.)

So how is the justice system supposed to deal with these offenders?    The judge in the Cowan case has been criticised for making the observation that an unintended consequence of tougher sentencing for sex offenders is that it can give them a greater incentive to kill their victim.   This makes some intuitive sense, but really, it has got to be balanced with the actual evidence about the rate of recidivism.   What I find particularly hard to credit is that second offence sentences for sexual assaults on children should take this effect into account. 

The Courier Mail is running hard on the previous judges being too lenient in sentencing.   I generally am wary of such media campaigns for various reasons, but it is interesting to note that there was an appeal by the Prosecution which failed against the 7 year (with non parole of 3 1/2 years) sentence for Cowan's second offence in Darwin.  The point is that, reading around on the topic, there do appear to be grounds to be concerned that judges may have an inadequate appreciation of the recidivism rates for this particular type of offender.  If the media can play a role in highlighting this, I don't have a problem with that.

But even then, longer sentences for early offences is not the only issue.   The community hates the idea of released repeat offenders of any age being anywhere near them, and who can blame them, really?  Chemical or physical castration if issued as a punishment by the State feels either too medieval, or "Clockwork Orange," to most liberals, I assume, but it is interesting to see it is still a live issue as a voluntary measure in the United States, and chemical castration is a recently introduced punishment in Korea.  

(One argument noted against physical castration is that men can seek to counteract its affects by testosterone patches - which are presumably not so hard to get your hands on these days.)

The article about the Korean situation notes the 50% recidivism rate for pedophiles:

Surgical castration reportedly produces definitive results, even in repeat pedophilic offenders, by reducing recidivism rates to 2% to 5% compared with expected rates of 50%. Chemical castration using LHRH agonists reduces circulating testosterone to very low levels, and also results in very low levels of recidivism despite the strong psychological factors that contribute to sexual offending (10). Chemical castration has some advantages over surgical castration. First, although chemical castration is potentially life-long for some offenders, it might allow sexual offenders to have normal sexual activity in context with psychotherapy. Second, some sexual offenders may voluntarily receive chemical castration. Third, chemical castration may be a more realistic restriction than electronic ankle bracelets or surgical castration. Fourth, unlike surgical castration, the effects of anti-libido medication are reversible after discontinuation. Finally, the general public may feel relieved knowing that sexual offenders are undergoing chemical castration.

 I'm not at all sure that the public thinks the reversibility of chemical castration is an advantage, but at least chemical castration (I assume) avoids the issue of physical castration being countered by testosterone.

I do not have a conclusive view on this, but I would not reject a serious discussion about the voluntary use of chemical castration as a precondition for release of offenders such as Cowan, regardless of their age.

Update:   I see that a New South Wales Parliamentary committee is said to be already considering chemical castration as a sentencing option.   This report notes that civil libertarians were unhappy with the suggestion, but interestingly, the opinion of one important group of professionals sounds quite sanguine and practical about it:

But the Royal Australian and New Zealand College of Psychiatrists president-elect, Louise Newman, believes chemical castration, which works as long as the patient stays on the medication, should be considered for the more "hard core" sexual offenders.

"It's certainly not a cure or a way of reducing all risk, but it might be seen as a useful component of treatment or management for some of these very difficult cases, where we're unlikely to see response to other methods," Professor Newman told ABC News Online.

"They're not commonly used at all and they are not needed other than in the fairly difficult group of very severe offenders."

The drugs impact on liver function, so those undergoing the treatment usually have their health checked regularly.

Professor Newman says that although some sex offenders have a good chance of recovery, there will always be a small group of people who will continue to pose a risk to the community.

"There's always some risk of reoffending and obviously someone can offend in various ways," she said.

"Clearly there is a group of people for whom risk is significant and they might have ongoing and really severe difficulties in managing their impulses.

"Containment and monitoring of those sorts of people might actually be necessary to ensure community safety."

 I could not think of a more ideal candidate for having his release on parole subject to a lengthy mandated period of chemical castration than Cowan on his second sentence.  Of course, this would presumably have stopped a relatively young man from marrying and having kids as he did, but look at what it could have stopped.

I also see from Wikipedia that, surprisingly, in the United States, California was the first state to introduce it as a punishment for child molestation.  It is a mandatory if going on parole after a second offence.  The article notes about 7 other states have "experimented" with it; I am a little surprised that it has not been used more widely in some of the more conservative states. 

The Wikipedia story also lists quite a few European nations that have implemented it since about 2010.  There would seem to be a bit of an international movement towards accepting it as useful particularly for repeat offenders against children.

It seems to me that it is time for it to be discussed in more detail in this country, too.