I just watched Bully
IMDB Info last night. Twice.
It is extremely graphic and very realistic as opposited to films based on murderers but those kinds of films are often over-dramatic.
I found it to be an excellent film simply because it gave me an insight to what the kids were feeling after murdering a bully from high school.
The fact that all those kids looks like any average joe/jane in high schools and anybody you go to school or work could be targeting you.
I recommend this film for parents who are raising kids that are attending high school.