Affiliate Marketing Secrets

So me and my friends we’re longboarding down some companies parking garage pretty late tonight(Saturday) and we parked his car right outside the garage but not in the garage. Now I know longboarding garages is illegal and all trespassing and all that but that’s beside the point. So we’re going down and here sirens and run and hide in the stairwell. Long story short we see police lights off in the distance by our car and sneak out of the garage then my friend, the owner of the car, walks over to it alone without any longboarding gear trying to pretend like he wasn’t affiliated with us. After he gets away and picks us up, he says the security guard of the garage was about to tow his car because he saw one longboard in the back. So pretty much all I’m asking is is it legall for him to tow a car he suspected was affiliated with us simply because there is a longboard in the back? I thought maybe he was just trying to scare us but I have no idea if he has juristiction to do that or not