Why was Archduke Francis Ferdinand killed?

well there was a group called the black hand and they were ethnic Serb's and they wanted freedom freedom from Bosnia which archduke Ferdinand ruled they hated him so much they wanted him dead.thegroup black hand sent four men into different places in a serbian city called sarajevo where the archduke was.the first man who tried to kill him got caught the second man went right up to archduke ferdinand and his wife and shot them both.