Investigators are still trying to determine the cause of a fire that killed a Fulton man Friday afternoon. Firefighters found the body of 67-year-old Stephen Rives inside his home on Nichols Street about 4-15 Friday afternoon. The duplex was a total loss. A woman living on the other side of the duplex got out safely. The Missouri Fire Marshal, the Highway Patrol, the Fulton Fire and Police departments are all trying to find the cause of the blaze.