If you consent to a search of your car, can you change your mind? Legally speaking, you can always revoke consent if you've given it, but the police are not going to respond well to that if they respond at all. They're going to pretend they don't hear you, or they're going to claim they already found what they needed to find. So, don't ever be in that situation. Always remember, Dr. judge videos. I don't answer questions and I don't consent to searches without a lawyer.