Even under missouri law I can petition the sentencing court to be removed from the registry after having registered (without a subsequent conviction of sexual crime) for ten years.

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Of course, the effect of increased imprisonment could have been delayed, producing a lower crime rate in subsequent years.

ECONOMIST: Prisoners

In states and cities where additives were banned outright the subsequent drop off in violent crime was equally dramatic, but where lead was phased out over time criminality tailed off less abruptly.

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The authors have been very cautious and careful to exclude other factors associated with criminality, and the thing that stands out is this rise and fall in lead levels and a subsequent rise and fall in crime.

BBC: Does lead poisoning make you violent?

That's why Misha Glenny criticises the simple response that hackers get jailed, particularly if they find themselves incarcerated in a penitentiary for white collar crime, where they can build up formidable networks for subsequent exploits.

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