The man, Justin Stafford, 23, told police he was punched by an Iron Brotherhood biker. Iron Brotherhood is a law enforcement motorcycle club, and, according to several sources, Fessler was president of the Whiskey Row chapter before he stepped down from the organization in late December.
"It has been an honor and privilege to have served the citizens of Prescott Valley and be involved in building a police department over the last 23 years," Fessler said in a written statement. "Because of the controversy associated with the events of Dec. 22, I feel compelled for the good of the agency and the town to take this time to examine my career, and chose to retire from the Town of Prescott Valley.
"I am proud of my service record as a professional police officer with the town."
Fessler did not immediately answer repeated phone calls and emails from The Daily Courier.