Strangely, I was just reading about the costs of prison in California because I read an article about "the grave injustice of mandatory sentencing" [1] and was curious about the associated costs to taxpayers. I don't feel personally affected by this issue, but I get the sense we are sentencing too many people for too long for non-violent drug offenses. Anyway, the cost of the prison system in California is about $7.9…
The day you suddenly feel affected by the issue, you won't be commenting on HN anymore. And with the questionable state of the US justice system you don't even have to commit a crime. An estimated 4% of inmates are innocent. Also, the problem is too long sentences for pretty much all crimes.. Americans aren't very forgiving.
Source?
From what I remember, 4% is for death row, which has a much higher standard of guilt. Most people who are sentenced for a crime plea guilty to avoid worse charges, which is a situation where a rational innocent individual would plea, meaning that far far more are likely innocent.