I hate to destroy your point, but I feel the need to take this to its ridiculous conclusion.
There is no definition for life. Look it up, scientists have not been able to pin one down for years. Ergo, if we can’t even define “alive”, then who is to really judge the ending or taking of life? We can’t define it and we can’t even say where it begins or ends. Therefore, I argue that we stop persecuting murders and put everyone in prison to death(since we can’t really define death this is without consequences).
Q.E.D