As long as you bought the firearm in your name, and didn’t use anything in the business to buy it, you should be fine. Typically, buying and immediately selling can get you looked at by the ATF if you do it frequently and someone fucks up with that gun when asked where the got it from. If they say they got it from some cash4gold place, then you’ll be fucked. If they say they bought it from love4boost, you should be fine.
As I said, there’s no REAL way to find out if a rifle/shotgun was used in a crime unless they have the firearm in their possession, as well as shell casings from the scene of the crime. It’s not like a pistol where that data was all on file, so if they find shell casings at a scene, they simple go through the CoBIS database and see it belongs to this serial number, then they go after the person whose permit that pistol is listed under.