First question is - how do you know he is a pedophile? has there been a trial? how did he get off? publicity itself is usually enough to destroy one's career and family.

As for the car - steal some license plates to use briefly (put them on and change them just before and after when you know you aren't being followed) or drive near by with a bike (making sure there are no cameras where you park) then bike to where his car is parked and back. His gas tank is probably locked - be prepared to pry it open.