A 15-year-old faces a murder charge after authorities say he shot and killed a boy who was riding in the backseat of his mother’s car.

The deadly shot, initially believed to be the result of a drive-by, was fired from a gas station in the neighborhood, DeKalb County police said. The teenager was arrested about 2 p.m. Wednesday. Authorities are not releasing his name because he is a juvenile.

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T’Rhigi Diggs was taken to a local hospital after the April 1 shooting and later died. He had just turned 3.

T’Rhigi’s mother, Rashonda Craig said she was driving on Eastland Road near Bouldercrest Road in southeast Atlanta about 11:30 p.m. on April 1.

She told Channel 2 Action News she saw a paintball gun.

“And then I heard a real gun,” Craig said.

DeKalb County police are still searching for a witness in the deadly shooting.

Credit: DeKalb County Police Department

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Credit: DeKalb County Police Department

Craig realized her son, who was strapped in the car seat behind her, was unresponsive and pulled over at Bouldercrest Road and Cecilia Drive, DeKalb police Lt. Lonzy Robertson said.

Authorities turned their search to a gray Dodge Charger with a temporary tag that pulled alongside Craig’s SUV. But investigators — using surveillance footage from a Texaco gas station off Bouldercrest Road — located several witnesses who confirmed the shooting occurred there.

By 8:15 p.m. Wednesday, investigators were still attempting to locate another witness.

“The loss of T’Rhigi is tragic and senseless,” DeKalb police chief Chief James W. Conroy said in a news release. “It is my hope that this arrest will bring some sense of comfort and closure to his family.”

In other news:

Benjamin Hosch drowned in a small pond after wandering away from a summer camp outing at Cochran Mill Park last summer.