 And I guess he was also a member of a local gun group known as the Clareton Sportsman's Club, according to a statement from the club lawyer. So we know that. We know he had some experience with guns. What is known about the weapon itself? At a press conference yesterday, the FBI said Crooks had used an AR-15-style rifle when he opened fire from the roof of a building just outside the rally venue. They said the weapon was purchased legally by his father illegally.