A former Pine Lawn police officer has been charged with assaulting a clerk at a gas station.

The St. Louis Post-Dispatch reports that 36-year-old Nicholas Stone was charged Monday with third-degree assault following an investigation by the Missouri Highway Patrol.

Court documents say that while Stone was on duty on Nov. 17, he went behind the clerk's counter at a Phillips 66 gas station and slapped a woman working there on the buttocks. The newspaper says the incident was captured on surveillance camera.

Edward McGee, a spokesman with the St. Louis County circuit attorney's office, said that Stone resigned from the Pine Lawn Police Department a day or two after the incident. Pine Lawn no longer has a police department. The city is being patrolled by the North County Police Cooperative.

Online court records do not list an attorney for Stone.