What if your clone decided you should die? Would he/she be commiting murder? Maybe it would be justifiable homicide?

He/she could always plead temporary insanity. He/she was confused as to who(m) was who(m) and decided that he/she was the original and he/she'd made a mistake and was only setting about rectifying the error.

Or, in the confusion of "who's who," he/she just went postal and whacked you.