WICHITA, Kan. (AP) — Federal authorities say they have no plans to file charges against a company that contracted to provide dental services for the Kansas Army National Guard. The U.S. attorney's office in Wichita confirmed Thursday that the FBI has concluded its investigation of Dentrust, a Pennsylvania company that performs dental screenings and treatment for Guard soldiers. Both state and federal governments prohibit employees from accepting gifts from outside entities. The company's attorney says the investigation stemmed from a coupon that a dental worker gave a Guard member who mentioned he was going skiing. The coupon saved the Guard member $17. Dentrust spokesman Ernest Baynard says Dentrust had no knowledge of the coupon or the interaction, and that no other interactions of any type were found. The federal reporting limit for gifts is $40.