The former chief of the Sunriver Police Department has pleaded guilty to harassment.
Marc Mills received no jail time at Thursday's court hearing and was fined $100.
Deschutes County District Attorney John Hummel said the chief struck a police sergeant in December during a work-related dispute. Mills resigned last month.
"Marc Mills has over 40 years of law enforcement service in Central Oregon which includes numerous significant accomplishments and thousands of lives impacted in a positive way and for this he should be commended. At the same time, this conviction serves as a reminder that in Deschutes County no one is above the law," Hummel said in a statement released Thursday.
Mills had been chief of police in the central Oregon resort community since 2012.
Copyright 2018 The Associated Press. All rights reserved. KPTV-KPDX Broadcasting Corporation contributed to this report.