The maximum prison sentence should be 20 years unless it can be proven beyond reasonable doubt that the person being released would represent an imminent danger on the community (and even then, such an inmate should probably be institutionalized rather than jailed).
"Beyond reasonable doubt" implies a high enough standard for proof that we would release large numbers of people who we know are probably dangerous.
It is possible to keep an eye on former inmates who might or might not be dangerous through means less invasive than prison. This should be enough of a deterrent in most of the cases.
So you support exporting the power of the prison into ordinary life?
