We have the data that it LIKELY won't, but that just means we need to do better with our prisoners and rehab programs. It's not an excuse to let someone who killed someone right back onto the streets.
Are other countries with better rehab programs letting manslaughter convicts out in less than four years?
https://en.m.wikipedia.org/wiki/Murder_in_Swedish_law
Apparently in Sweden you get 6-10 for manslaughter.
We're talking about voluntary manslaughter. "Drap" or whatever. That's 6-10 in Sweden.