I used to be against life in prison and death penalty.
Im still against death penalty in general even for people like Saddam Hussein, he probably knew alot of things we could benefit from.
What life in prison mean can differ, they can be forced to work and pay their debt to society or it can be a nice place better then most people have. Someone that have done horrible crimes will probably never really fit in society. What to do with them? Use them for cheap work, send them of to a island or kill them, in society they shouldnt be.
Society change, people rarely do. We dont want killers walking around. And this time it will be killers with experience from prison, not the softer kind they where before.