DENVER — A former officer with the Lakewood Police Department is accused of sexually assaulting a woman he offered a ride to last month, according to a release from the Denver District Attorney’s Office

Randall Shaun Butler, 37, was arrested on Dec. 5, and is charged with two counts of sexual assault for the Nov. 16 incident.

The charges allege that at about 11 p.m., Butler offered to drive a stranded woman in his patrol car from the area of 10th Avenue and Sheridan Boulevard to a more secure location near her home, the release said.

Instead, Butler drove the victim to a vacant parking lot near 25th and Sheridan where, according to the release, the alleged assault occurred. The victim told police Butler kissed, groped and sexually assaulted her, and that she was afraid to resist an armed officer, according to an arrest affidavit.

Butler then left the victim in the parking lot and drove away in his patrol car, the release says.

Police said the victim used Denver Police Department’s online system SeekThenSpeak.org to report the sexual assault.

Upon learning the allegations, the department immediately put Butler on administrative leave and he later resigned from his position, according to the release. He had been an officer with the Lakewood Police Department since January 2013.

Lakewood Police are encouraging the public to call their tip-line at 303-763-6800 to report any other allegations against Butler.

Butler is scheduled to appear for an arraignment on Dec. 6 at 1:30 p.m.

Watch more local stories from 9NEWS: