He probably had a PI or his attorney working on it - you know what they say, you can dig up something on anyone. Hard to say if this is what happened, but it's entirely possible. Maybe Garrido did do this and therefore Maines was forced to quit and Nancy had nothing to say about it. Or maybe Phillip had information sent that he would disclose in court about Nancy if Maines went the route he said publicly he was going to take in her defense. Or Phillip just got a message to Nancy that he would do this if she proceeded and then gave her the strategy on how to request Maines be dropped.