I think he was not justified because Lennie was his family and family don't kill family. Lennie's aunt ask George to look after him so i think he should have been there for lennie not just go off of what the other guy's where saying. In the end of all of this George should of thought about what he was doing be for doing so now that Lennie is gone Geroge is going to be all alone with no one to really be with or to go find work with.
This is why a George should have not killed Lennie
