Ex-girlfriend: On-duty sex with former sergeant dated to 2022

Chico PD records show sex acts ‘escalated’ after sex-related demotion
by Dave Waddell | Posted October 30, 2025
Former Chico PD Sgt. Mike Williams

Chico police Sgt. Michael Williams began having “a lot” of sex on duty just a couple of months after he was demoted from lieutenant for engaging in sexual relations with a subordinate, according to Williams’s former girlfriend.

The ex-girlfriend’s timeline, provided to a police investigator, means Williams was having sex on the clock nearly three years before leaving the payroll of the Chico Police Department. Her revelations suggest the department’s disciplinary action failed to curb his behavior and may have instead provided increased opportunities to escalate misconduct that continued uninvestigated for nearly two years.

The ex-girlfriend’s account is contained in investigative reports obtained under a Public Records Act request. Williams did not respond to a message seeking comment on his ex-girlfriend’s account. read more