If the ultimate motivation of the car siezures is

to sell them and keep the money, what would happen if somebody acquired a few ounces or gallons of PCBs (poly-chlorinated biphenyls common in 20+year-old (non-electrolytic) capacitors), and sprayed them (only a very tiny amount per car should be necessary, maybe 1 milliliter or so?) into those siezed cars though a broken window (or injected through door seals).

A better use involves a flare and, um, an appropriately deserving building :-) Aloha Plume