Det. James Veltman had been trying to locate the rightful owner of the military decorations since they were turned over to him by an unnamed source just before Remembrance Day.
After going public with his search, Veltman received more than 100 inquiries and tips from across Ontario and even outside the province from people hoping to recover lost or stolen medals.
But a few key details about the medals that were not released to the public allowed the detective to confirm that a man who lives in the Ottawa area is the son of the original recipient and the rightful owner of the medals.
Detectives met last week with the veteran's family members, who do not wish to be identified.
Police say the investigation is now closed and no one has been identified in connection to any criminal charges being laid.
"We are grateful that this particular family has regained precious mementoes from a Canadian military veteran and hope others who are still searching have similar success," Kingston police said in a statement Monday.
Police had said the medals included a 1939-1945 star, a France and German star and a defence medal.