The TSA said two firearms were found at Detroit Metro Airport at different times on Thursday.
A Detroit police officer has been arraigned on a charge of being in possession of a firearm under the influence.
Ivan Berrien, 45, owns the rifle his 14-year-old son was playing with when it went off.
A 58-year-old Mount Clemens man is facing charges after he accidentally shot himself Tuesday night.
TSA officials said the weapon was loaded with an extra magazine with 20 additional rounds in it.
“Selling a semi-automatic pistol to Dantzler was like lighting a match to a powder keg,”
Officials say the woman had apparently applied for a permit for the pistol, but was denied.