Ontario's Special Investigations Unit has identified the man involved in a confrontation that saw an Ontario police officer shot and killed as Fred Preston, 70, of Burk's Falls.

The SUI says Preston remains in critical condition at Victoria Hospital in London.

CTV reports the 70-year-old is the police suspect and was shot eight times during a gunfight with officers.

Ontario Provincial Police Const. Vu Pham was shot and killed Monday after pulling over a vehicle in a rural area northwest of London.

The SIU says six investigators and three forensic investigators are investigating and that three witness officers and one subject officer have been designated.