Only one thing for it, Al.
A few lengths of endcapped copper pipe, stuffed full of NC or black powder, an electronic igniter and mercury switch, situated under the driver's seat area and/or fuel tank of that lying arseweasel's car.
a bag of rusty nails, bolts, and broken glass optional but most likely quite effective.
As soon as the car starts and moves off, the mercury switch will trip, setting off the electric match (a cap bank and length of fine nichrome wire will do the trick, coating it in a paste made of match heads will help ensure ignition.)
