Why would he be out in 10 years
Lock them up and throw away the key.
Any way you look at it someone has to let them go and when we come to our senses we can and will stop that from happening.
It is beyond me how a society that allows the state to take a life cannot figure out how to lock someone up for life.
Until then, I guess we have to kill them but imo death is too good for them and way too bad for us.