I ragazzi del massacro (1968)

1. Some youngsters kill their teacher; but they won't tell their motivation. The police detective on the case feels some sinister influence behind the young murderers.
2. About the search for an adult who pushed a classroom full of troubled teens to gang-rape and murder their female teacher. A hard-bitten Police Inspector named Liberti is put on the case and sets about brutally interrogating the young punks. He finally settles on a blond boy named Fiorello as the one most likely to squeal, but when he jumps from a rooftop, Liberti knows there is more to the teacher's murder than meets the eye.