The M9 Bayonet is a multi-purpose knife and bayonet officially adopted in 1984 by the U.S. Army. It has a 7-inch blade and is issued with a sheath designed to double as a wire cutter. The M9 ...

But they allege they found a key piece of evidence: his DNA on a Ka-Bar knife sheath left under the body of Madison Mogen, 21. The other three victims were Kaylee Goncalves, 21, Xana Kernodle ...