NEW : Soldier Marquinta E. Davis arrested in Tennessee , charged with murder . Victim , not identified , was shot several times with .45 caliber weapon . Wednesday incident prompted officials to temporarily shut down the Army base . The shooting is ` ` not a random act of violence , '' an official says .
NEW : Soldier Marquinta E. Jacobs arrested in Tennessee , charged with murder . Victim , not identified , was shot several times with .45 caliber weapon . Wednesday shooting prompted officials to temporarily lock down the Army post . The incident is `` not a random act of violence , '' an official says .