 They both happened, the fires at the former Diamond V plant off of G Avenue Northwest. A firefighter fell 30 feet while checking to be sure no one was still inside during the fire last Friday. That firefighter is still in the hospital and his return to work is not known. Fire chief says human activity likely caused both fires. The city already placarded the building in June. That means no one's supposed to be inside the old factory. The fire department says homeless people are known to camp inside the building.