Joe Raedle/Getty ImagesA “disgruntled employee” at a Mississippi Walmart killed two co-workers and wounded a police officer in a deadly Tuesday shootout inside the superstore, authorities said.Martez Abram, 39, a recently-terminated employee of the Southaven store, was charged with two counts of murder Tuesday afternoon, DeSoto County District Attorney John Champion said. The deadly incident began around 6:30 a.m., when Southaven police responded to reports of an active shooter at a Walmart near the Tennessee border. Abram “senselessly murdered” two store employees and wounded an officer before he was injured and apprehended, authorities said. The victims have been identified as Anthony Brown, 40, and Brandon Gales, 38, the DeSoto County Coroner’s Office confirmed to The Daily Beast. “These people were doing the same thing you and I do everyday, showing up to work in an attempt to provide for their families, then became victims of a senseless violent act,” Moore told repo...