 I have confirmed that Crooks was a member of a shooting range near his home, the Clareton Sportsman's Club. Crooks was also a registered Republican, but had donated $15 to a Democratic group back in 2021. He doesn't appear to have had any criminal record. The FBI, though, has its own tools to dig, and officials caution that this is going to be a long investigation and there's a lot of work to be done.