Kevin Blais bought the 2004 Ford Crown Victoria in an online auction from the Hartford, Connecticut, public works department.
He was cleaning it last week when he noticed a cracked area on the one-piece molded seat assembly.
When he removed the seat assembly to clean the floor, he found a plastic bag full of cocaine.
Blais thinks that a suspect stuffed the drugs through the crack to prevent police from finding them.
Hartford police were apologetic when he told them of the discovery.
