Parts car problem. Police called.

So last week I saw a 64 Barracuda (in parts cars section) . Agreed with the owner to take parts off this weekend then he could scrap the car. Came Saturday morning, paid him, and started pulling. End of the day I said I'd have to pickup a couple of tools and would be back in the morning.

Went there this morning and his mother comes over and says she thinks I've taken enough parts and should leave. I respond that my deal with the son was I take what I can Saturday,Sunday and then he can scrap the car and start pulling parts.

The , Im assuming, stepfather comes out and says leave or I call the police. I said go ahead. A short time later a cop shows up and says I have to leave. I say I have a agreement with the car owner to pull parts. He replies that it's a civil matter and I have to leave or be charged with trespassing. So I left. Anyone deal with something similar. The son was not around this morning. He didn't give me a receipt but freely admits I paid to remove parts.