Complex sentence: He was raised as an only child by an abusive step-father Deke, and after Deke's death at the hands of mobster Joe Scully, Sonny became involved in organized crime.
Split into simpler sentences: He was raised as an only child by an abusive step-father Deke. After Deke's death at the hands of mobster Joe Scully, Sonny became involved in organized crime.