Newton County deputies are searching for a suspect accused of running over and killing a developmentally disabled man Thursday after a dispute at a Fourth of July gathering.

Joshua Anderson and 20-year-old Kevin Marshall got into a fight at a home on North Lake Drive near Covington, Channel 2 Action News reported.

Witnesses broke up the scuffle, but as Marshall walked home, Anderson allegedly got into his Toyota pickup truck, sped down the road and struck Marshall before leaving the scene.

“He wasn't doing anything. He wasn't doing nothing,” Robbie Marshall, Kevin’s mother, told the news station. “He was such a sweet boy. He wouldn't harm nobody ... This man got in his truck and he ran over my son and he killed him.”

Kevin Marshall

Credit: Channel 2 Action News

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Credit: Channel 2 Action News

Marshall said her son had the mental capacity of a 13-year-old.

Anderson, who was visiting his girlfriend’s home at the time, hasn’t been seen since, authorities said.

“I heard a boom and I thought he wrecked his truck. When I got down here, that kid was laying on the ground,” said Samantha Browning, the mother of Anderson’s girlfriend. “I’m sorry I couldn’t make them stop fighting. I’m sorry I couldn’t protect him from being hurt.”

Police said Anderson should be considered armed and dangerous. He was last seen driving a gray 2001 Tacoma with heavy front-end damage and Georgia license plate DGF633.

Robbie Marshall said she wants the man responsible for her son’s death behind bars.

“I want him to be punished for what he done to my son because to me, that is premeditated murder,” she said.

Anyone who sees Anderson or knows his whereabouts is asked to call Newton County deputies at 770-784-2100 or Crime Stoppers at 404-577-8477.

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The attorney was found dead in 2018.