Police in North Texas say a handcuffed theft suspect left alone in the back of a squad car managed to roll down a window, open the door, then steal the vehicle.

Police arrested 41-year-old Darren Porter on Friday on suspicion of breaking into an antiques shop in White Settlement, near Fort Worth.

The window switches in the back of squad cars are supposed to be disabled, but not in this one. Police Lt. J.P. Bevering says Porter was able to roll down the window, reach out and open the door. Dash-cam video from another squad car shows him climbing into the driver's seat and taking off.

Porter remained at large Monday.

Police say they're checking other squad cars to make sure the windows don't open.