On Oct. 23, officers responded to reports of a shooting in the 200 block of Alastair.
Authorities say a group of men met up to fight, and someone displayed a gun and started shooting.
After reviewing cell phone video of the fight, police say they identified 19-year-old Fabyan Rojas as the shooter.
Rojas allegedly shot Jesus Maldonado three times. He was pronounced dead at Southeast Memorial Hospital.
Rojas, who is reportedly a known street gang member, was arrested and charged with murder.