They aren’t. It is NICS, FBI criminal (what the fingerprints are for), and various state databases.NICs, MD department of health, and several other databases are checked wouldn't be surprised if they don't hit up the SSDI and any VA ones for PTSD and other MH issues.
Just want to make sure the feds don’t have anything like unknown fingerprints on a murder weapon that happen to match you. Or in NICS, or all of the state databases they can access. VA and SSDI aren’t done. Neither can release any information.