A man accused of shooting a stranger multiple times outside a DeKalb County gas station claims it was all in self-defense, police said.

Tevin Merriweather, 25, is facing a charge of murder in the shooting Sunday afternoon that killed Myron Pierce, 34, at the Shell station off the Glenwood Avenue I-20 exit. Pierce was cutting grass at a woman’s home and accompanied her to the gas station to get some chips, according to a police report obtained Monday by AJC.com.

The homeowner told DeKalb police Pierce got into an argument with Merriweather inside the gas station that spilled out into the parking lot. It got physical, and she claimed she saw Merriweather pull out a gun.

She ran away from the window and did not see who fired the shots. Another witness told officers he heard at least 17 gunshots, and investigators collected a total of 22 rounds from the parking lot, police said in the report.

Pierce was shot at least three times in his upper chest and two more times in his lower right side, according to medics at the scene. He was taken to a local hospital, where he later died.

Police have not said what triggered the argument inside the gas station, but a manager told them it was likely recorded on the store’s surveillance cameras.

Merriweather, who is from Lithonia, was arrested on a charge of murder. He was being held Monday afternoon in the DeKalb County Jail.

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A GoFundMe is helping the man return to the United States.