WICHITA, Kan. (AP) — Closing arguments are scheduled for today (MON) in a criminal case that indirectly involves a Kansas law seeking to prevent federal prosecution of anyone owning firearms made, sold and kept in the state. Shane Cox and Jeremy Kettler are on trial in U.S. District Court in Wichita on federal firearms violations. Cox is the owner of Tough Guys gun store in Chanute and is accused of illegally making and marketing firearms. Kettler testified that he bought an unregistered gun silencer after Cox showed him a copy of the state gun law signed by Governor Sam Brownback. U.S. District Judge J. Thomas Marten told jurors that what Kettler believes is not necessarily the law. The Kansas attorney general's office has intervened in the case to argue the constitutionality of the state's gun law.