请问句子would you please tell me the truth who did it for us?是同位

请问句子would you please tell me the truth who did it for us?是同位语从句还是定语从句?
句子would you please tell me the truth who did it for us?中,
根据同位语从句,同位语从句是对其同位语的名词作进一步解释,说明名词的具体内容的从句.
句子中who did it for us是对the truth的解释说明,本句就是同位语从句.
根据定语从句,定语从句是用来修饰先行词（名词或代词）的从句.
句子中who did it for us是对the truth的修饰,truth为先行词,本句就是定语从句.