A District man was found guilty Thursday of walking into a Southeast Washington barbershop in the middle of the day three years ago and fatally shooting a man as he sat in a barber chair.

During the three-week trial, prosecutors argued that just after 11 a.m. on Oct. 10, 2014, Antwon Green, 29, ran into the Kutt-N-Up in the 1400 block of Good Hope Road, pointed a pistol and fired several times at Breond Keys as Keys sat in the chair wearing a barber smock. The shooting sent customers and employees running. Keys, 38, fell to the floor and died of his wounds.

Assistant U.S. attorneys Glenn Kirschner and Allessandra Stewart argued before the jury that just before the shooting, Green had walked up to the barbershop and pointed at Keys as he was getting his hair cut. The prosecutors said that minutes later, Green returned to the shop in different clothes, including a dark-hooded jacket, and carrying a pistol. They said he raised the gun and began firing at the barber chair.

No witnesses came forward, but authorities recovered DNA evidence, including Green’s fingerprints from one of the cartridge casings recovered on the barbershop floor. Authorities also found Green’s DNA on the inside of Keys’s front pocket. Authorities say a security video showed Green reaching into Keys’s front pocket to steal the contents before running out of the shop.

Green’s attorneys had repeatedly argued that police had arrested the wrong man and that their client was innocent. The jury deliberated for two days before finding Green guilty of first-degree murder while armed and other gun-related charges.

The H. Carl Moultrie Courthouse at 500 Indiana Ave. NW is part of the Superior Court of the District. (Keith L. Alexander/The Washington Post)

Green is scheduled to be sentenced Feb. 16 by Judge Judith Bartnoff.