Is it right to take someone's elses Life?

Is it right to take someone's elses Life?

Of course not!!! We had this debate this noon at our English period. Is it justifiable for George to take away Lennie's life? The point of the other side, they said it was justifiable, is that Lennie is retarded and is a hindrance to George's dreams and Lennie killed someone(out of accident because Lennie is autistic). They said that if George and Lennie ran away from the angry mob out to kill and torture Lennie, they would still repeat the same process over and over again. Besides if Lennie is caught he will suffer more unlike if George shot Lennie on the back of the head and everything would end with out pain.

My side is, hell no! It's not justifiable even if George only commited a so called "mercy killing" because he doesn't want Lennie to be hurt and because he loves Lennie... Love? Does love mean killing? If I love someone and I don't want this someone to be hurt or affected by the outside negative forces I should just kill him/her to protect her? George could have just ran away to save Lennie from the angry mob. If Lennie do have to answer to the crime he commited not out of his free will then he has absolutely no right to place the law in his hands. Just send Lennie to the authorities so that they would be able to protect Lennie and they will understand that Lennie is mentally handicapped!

Life is precious, it is a gift from God, and no one has any right to take this gift away from someone. No one has the right to decide who will live and who will die. There are a lot of choices and possibilities that can happen. Killing can never be justifiable!