Tech. Sgt. Steven Mangrum, 27, assigned to Davis-Monthan's 355th Security Forces Squadron, was found dead in his home July 31 at about 5:30 p.m.Mangrum was a native of Pflugerville, Texas, and had been stationed at Davis-Monthan since April 2008. Mangrum had deployed in 2005, 2008, and 2011 in