US and UK jails are overcrowded - inmates are mentally ill

I've just came across with this at The Lancet:

"Prison health Up to 90% of inmates in UK prisons have at least one mental-health disorder, and 10% have a serious mental-health problem, according to a report by the Prison Reform Trust. The report says that such inmates receive unsatisfactory treatment and that care rather than incarceration could help to relieve pressure on the nation’s over-crowded jails."

I've remembered this post Marissa Miller wrote with this information:

"Two thirds of prisoners nationwide with a mental illness were off treatment at the time of their arrest, according to a new study by Harvard researchers that suggests under-treatment of mental illness contributes to crime and incarceration."

It's from "Harvard study: Under-treatment of mental illness contributes to crime." and Marissa explains:

"The article is poorly titled. The headline was designed to be alarming: "Watch out for those crazy people! They're violent!" It's not "under-treatment of mental illness" that "contributes to crime" so much as it is "two-thirds of inmates with mental illness are off medication." There's nothing in the article that asserts people with mental illness contribute to the crime rate in America. An interesting read but an inaccurate head."

I'll just leave these data for the moment because I'm not able to think about it all now. I truly believe that something very strange with these numbers, diagnoses... the whole thing.
It's amazing that mental illness is associated with crimes in such a way.