Complex sentence: According to school legend, Ricky has killed several people, including his own little brother, but a teacher tells Clifford that the only violence in Ricky's past occurred when his younger brother died accidentally while playing with a gun.
Split into simpler sentences: According to school legend, Ricky has killed several people, including his own little brother. A teacher tells Clifford that the only violence he's aware of from Ricky's past occurred when his younger brother died accidentally while playing with a gun.