Did you say the truck is registered to your parents? Is your name on the title at all?
See that makes a difference legally. I'll give you an example. I leave a gun in someone elses car(assume that's illegal). The police pull this car over and illegally search that car (no warrant, no cause, no consent from owner). The owner of the car had his rights violated. So if the police find something illegal in the car that belongs to him, that evidence will be thrown out. But if the police find my gun that is another story. My rights were not violated. It's not my car. I have no expectation of privacy in someone else's car. So that evidence is admissible. It's called standing, I have no standing to challenge the government action since my rights were not violated.
Somebody correct me if I'm wrong but I think that's how it works.
