ST. LOUIS COUNTY • A former Chesterfield police officer pleaded guilty Thursday of using a spy camera to secretly record men in the restroom of a Chesterfield gas station.

David E. Cerna, 35, will be sentenced April 1 in St. Louis County Circuit Court on the misdemeanor and felony invasion of privacy charges.

In October, he admitted guilt in similar charges in St. Charles County, related to videos he posted online of men having anonymous oral sex with him at his home in Wentzville. Sentencing there also is scheduled for April.

In the Chesterfield case, police have said that Cerna collected videos from a camera he installed in a men’s restroom at a Mobil On The Run gas station on Clarkson Road south of Chesterfield Mall. Some of those videos were posted on his porn website, authorities said.

A tip from a television news reporter triggered an investigation, and police traced the website to Cerna’s home in the 4000 block of Jessica Drive, where he was arrested by fellow officers.

Cerna, who was a Chesterfield officer for six years, was later fired.