 In a social media post writing, he cannot allow a shooter or potential assassin to force change to scheduling or anything else. The shooting suspect reportedly had explosives. Sources are using the word IEDs found in the car of 20-year-old suspect Thomas Crooks. We know that the gun was purchased legally by his dad. Authorities are looking into the possibility he may have had access to other guns. Fox's David Spunt, sources also telling AP, Crooks pointed a rifle at an officer who found him on a rooftop shortly before the shooting.