18 Pa.C.S. § 7706: Presumptions.

(a) Vehicles.--Any person or persons who transport, sell, transfer, purchase, possess or receive any vehicle or vehicle part upon which the vehicle identification number has been altered, counterfeited, defaced, destroyed, disguised, falsified, forged, obliterated or removed or who fails to keep, possess or produce the records required to be kept, possessed or produced for the vehicle or vehicle part under 75 Pa.C.S. § 6308 (relating to investigation by police officers) shall be prima facie evidence under section 7702 (relating to owning, operating or conducting a chop shop) of that person's or persons' knowledge that the vehicle or vehicle part was illegally obtained.

(b) Police report.--A police report which indicates that a vehicle or vehicle part was reported to police to be in a stolen status at the time it was possessed shall be prima facie evidence that the vehicle or vehicle part was possessed without permission of the owner.