 Quantico Virginia for analysis. The FBI says the gun was purchased legally, it believes, by the shooter's father. Rojek identified it as an AR-556, which is an AR-15 style rifle. The cell phone, though, is an urgent focus for investigators. That's NPR's Ryan Lucas. Authorities say Crooks was registered Republican but donated $15 to a Democratic group in 2021, and it doesn't appear he had a criminal record.