Investigators say a police officer shot and killed an person during an exchange of gunfire in Canandaigua. It happened yesterday afternoon at the Pinnacle North Apartments on North Shore Boulevard.The Canandaigua police officer had gone to the apartment to check on the welfare of a person there and was not hurt in the gunfight. The Department of Corrections and Community Services says an off-duty parole officer died at the scene. But it's not clear if that officer was the resident who was the subject of the police visit.