Complex sentence: Adolfo Constanzo was an American serial killer, drug dealer and cult leader, known as "El Padrino de Matamoros" (The Godfather of Matamoros).
Split into simpler sentences: Adolfo Constanzo was an American serial killer, drug dealer and cult leader. His nickname was "El Padrino de Matamoros" (The Godfather of Matamoros).