1. Short title This Act may be cited as the Gun Trafficker Detection Act . 2. Reporting of lost or stolen firearms to law enforcement authorities (a) Reporting requirement Section 922 of title 18, United States Code, is amended by adding at the end the following: (aa) Within 48 hours after a person not licensed under this chapter who owns a firearm that has been shipped or transported in, or has been possessed in or affecting, interstate or foreign commerce, discovers or should have discovered the theft or loss of the firearm, the person shall report the theft or loss to the Attorney General and local law enforcement authorities. . (b) Penalties (1) In general Section 924 of such title is amended by adding at the end the following: (r) Whoever violates section 922(aa) shall— (1) in the case of the 1st violation by the person, be guilty of a class C misdemeanor; (2) in the case of the 2nd violation by the person, be guilty of a class B misdemeanor