With the facts laid bare, any further excuses are useless.
Tips
memory
辩 (to argue/dispute) + 白 (to make clear, lit. 'white/bright'). The image: arguing until your innocence is clear and white. Compare 表白 (to make one's feelings clear, often a confession of love) — same 白 'make clear' usage.
usage
Often appears with 为自己 (to defend oneself) or 替...辩白 (to defend someone else). Carries a slight implication of accusation already in the air — you don't 辩白 about something nobody questioned.
