Brantford police have charged a member of the Hamilton Police Service as part of a domestic assault investigation.
The 52-year-old constable was taken into custody Wednesday, and released on a promise to appear in relation to the off-duty incident.
Brantford police say the patrol officer, who has been with the Hamilton force for 29 years, has been charged with assault and has a November court date in Brantford.
Hamilton police are not releasing the name of the constable because that could identify the victim.
The officer has been reassigned to administrative duty.