Classmate killed on PROM NIGHT

My classmate was shot and killed on Friday, Prom night. She was shot five times in the face.I wanted to go to the Prom but my mom didn't let me go but know I am so thankfull that my mom didn't let me go.What a want to know is why did they have to kill that little girl. MEN! SHE didn't even get to finish the eleventh grade, didn't get to graduate and most of all didn't get to persue her dream that she always talk about in class. She wanted to become a nurse. she wanted to save lives, but I guess thats not going to happen as she is no longer around.