Civil rights attorney S. Lee Merritt, who represented victim Botham Jean’s family, tweeted Saturday that Joshua Brown’s mother asked him “to help find out who murdered her son.”

Without mentioning Brown by name, the Dallas Police Department said in a news release that a shooting victim had called police about 10:37 p.m. Friday and later died at a hospital.

Dallas police said the victim “was found lying on the ground in the apartment parking lot with multiple gunshot wounds.”

“Dallas Fire-Rescue responded and transported the complainant to Parkland Memorial Hospital, where he died from his injuries,” the department said.