Complex sentence: On his return from juvenile hall, Miklo visits his mother, who is actually the younger sister of cousin Paco's mother, and proves himself worthy for the gang when he performs an attack on a rival gang, "Tres Puntos".
Split into simpler sentences: On his return from juvenile hall, Miklo visits his mother. Miklo then proves himself worthy for the gang when he performs an attack on a rival gang, "Tres Puntos".