My buddy is an ATF agent, I would say none of your business, how I can afford guns, but I would expect ATF to come by if a gun I purchased was used in a crime, especially if I never reported it stolen.
Most of this sounds like common sense investigation, not so much big brother overstepping:
Federal agents hunt for guns one house at a time | Chronicle | Chron.com - Houston Chronicle
Most of this sounds like common sense investigation, not so much big brother overstepping:
Federal agents hunt for guns one house at a time | Chronicle | Chron.com - Houston Chronicle