ROCKFORD, Mich. (WOOD) — A Rockford police lieutenant has resigned after being placed on administrative leave earlier this month, officials say.

Lt. Aaron Sawyer was placed on administrative leave from the Rockford Department of Public Safety on Dec. 9, a spokesperson for Rockford told News 8. The spokesperson said there was an incident in early December but did not say what that incident was.

“We became aware of an incident early this month in connection with this officer, who was placed on administrative leave Dec. 9,” the spokesperson said in a statement. “We have since accepted the officer’s resignation.”

The spokesperson said the Ottawa County Sheriff’s office is investigating the incident.

A spokesperson for the Ottawa County Sheriff’s Office confirmed to News 8 they are investigating a hit-and-run crash near Hudsonville on Dec. 9, and as a result of that crash they contacted the Rockford Department of Public Safety.

FILE – Aaron Sawyer in court in 2015.

In 2015, Sawyer was the subject of a Target 8 investigation after he was arrested for speeding and drunken driving. He was accused of driving twice the legal limit and pleaded guilty to drunk driving. He did not receive any jail time.

At the time of the 2015 incident, Sawyer served as a police sergeant at the Rockford Department of Public Safety. He was promoted to lieutenant in 2017.

The Ottawa County Sheriff’s office says their investigation is ongoing.

—News 8’s Whitney Burney contributed to this report.