( CNN ) -- A soldier has been detained and charged with murder in Wednesday 's shooting death of a civilian employee at Fort Knox , Kentucky , according to a court document and the U.S. Army Criminal Investigation Command . The soldier , identified in an FBI criminal complaint as Marquinta E. Jacobs , was assigned to the 3rd Brigade Combat Team , 1st Infantry Division . He was captured in Tennessee , where his mother lives . The civilian , who has not been publicly named , was shot several times with a .45-caliber handgun in a parking lot at Fort Knox about 5:40 p.m. Wednesday . He was pronounced dead about an hour later . The victim was shot near Jacobs ' pickup truck , and Jacobs fled the scene in the truck , according to the complaint filed by FBI Special Agent Mark A. Coleman . According to Coleman 's complaint , Jacobs ' wife said Jacobs owns a .45-caliber handgun . She allowed investigators to search the home ; they found boxes of ammunition believed to be the same type as that used in the shooting . Jacobs ' wife said her husband had come home , left the truck and departed again on a motorcycle . Investigators found the motorcycle early Thursday morning at the home of his mother in Portland , Tennessee , the complaint says . Jacobs was believed to have left his mother 's place in a Kia Rondo . He was later apprehended by Portland police and Army Criminal Investigation Command agents , the command said in a press release Thursday afternoon . The shooting occurred outside Fort Knox 's Human Resources Command building , prompting officials to lock down the army post for an hour . Chris Grey , a spokesman for the CID , said agents were investigating the incident as `` a domestic issue and not a random act of violence . '' Authorities are withholding the name of the victim pending notification of his family .
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 .