Another man, whose identity was not released, was also shot. Police said his injuries were not considered life-threatening.
Detectives from the Prince George’s department, which handles homicide investigations in New Carrollton, are investigating.
On Wednesday, police said they had arrested and charged Daahme Carroll, 22, of New Carrollton, in connection with Brown’s death. Carroll also faces charges in the shooting of the other man, police said.
Dana Hedgpeth contributed to this report.