I don't know the figures for the US but here in the UK 70% of convicted criminals end back in prison. There is something wrong with the system and it should be fixed. They get convicted, get sent to prison and come out much more sophisticated criminals to continue. Prisons have been described as the Universities of crime. Muslim extremists are also finding prisoners to be a fertile breeding ground for their murderous plans too. The do gooders in power just can't make the obvious decisions to combat this.