“It was more a matter of bullet construction than caliber.” That line from retired FBI firearms veteran Bill Vanderpool captures why one of the most argued-about handgun debates ended, at least inside ...

TUCSON, Ariz. (KGUN) — A Tucson gun shop owner is defending helping the FBI in the Guthrie case. Phillip Martin, Co-Owner and Manager of Armor Bearer Arms, says an FBI agent visited his gun shop on ...

Add Yahoo as a preferred source to see more of our stories on Google. NewsNation’s Brian Entin reports that FBI agents have been visiting several gun stores in the Tucson area with a list of 40 names ...

Add Yahoo as a preferred source to see more of our stories on Google. Nancy Guthrie; Suspect seen in doorbell footage at Nancy's Tucson, Ariz., home on Feb. 1. Nathan Congleton/NBCU Photo ...

An Arizona gun store owner says an FBI agent asked him to review recent firearm purchases tied to a list of nearly two dozen people, as the search for Nancy Guthrie continues into a third week.