Police in Niagara region say an officer has been charged with mischief.
Investigators did not release any details about the allegation.
They say a member of the public called police about an incident that happened in St. Catharines.
The accused has been a police officer for 21 years, and was off-duty at the time of the allegation is said to have occurred.
Sgt. David Bridel will appear in court on Tuesday.