Criminal charges will not be laid against a Durham Regional Police officer in connection with the shooting death of a 47-year-old Ajax man last December, the Special Investigations Unit has confirmed.

Michael MacIsaac was shot on Dec. 2, 2013 and died in hospital as a result of his injuries.

In a release from the SIU, police say MacIsaac left his residence in Ajax unclothed on the morning of December 2 after a reported physical confrontation with his spouse and sister-in-law.

Police say they received several calls about the man running around naked in the neighbourhood and at one point, he was seen confronting motorists on Dring Street, banging on car windows and hoods.

A woman told officers she was sitting in a vehicle in her driveway when she was approached by MacIsaac. Investigators say MacIsaac picked up a patio table and broke it as he threw it up against her front door.

According to police, an officer who had just arrived on scene saw MacIsaac coming at him in a threatening manner with a metal table leg in his hand.

Police say the officer drew his firearm and ordered MacIsaac to stop and drop his weapon. When he continued to approach the officer, MacIssac was shot twice.

MacIsaac was transported to Rouge Valley Hospital and then airlifted to St. Michael's Hospital but died the next day.

"In the final analysis, the subject officer was in the lawful discharge of his duties when he was confronted by Mr. MacIsaac, armed with a metal table leg approximately one metre in length who was not complying with commands to stop and drop his weapon.," said SIU director Tony Loparco.

"Accordingly, there are no reasonable grounds, in my view, to believe that the subject officer committed a criminal offence in connection with the shooting and death of Michael MacIsaac."

MacIsaac's family previously told The Canadian Press that he suffered from epilepsy. They said they believe that his condition is the reason he left his home in a delirious state that morning.