Father appealed a court order denying him reunification services to his biological son based on his abuse of the son’s half-siblings. Father contended that section 361.5, subdivision (b)(6) did not apply to him because he was not the father of the half-siblings. The court rejected his argument and affirmed. The term “parent” in section 361.5, subdivision (b)(6) refers to father’s status with respect to his son, not to his status with the siblings who were abused.