What is the name of this movie?

All a remember is a part in the movie where a boy was walking down a street and another boy and his friends came by and started messing with him. One of the boys pulled out a knife and waved it across his stomach. In another scene, the first boy was fighting the second boy and his friends and at the end of the fight, the first boy got stabbed in the stomach. Later a woman answered her door and there were hundreds of people standing in her yard with candles.