Hieu Hoang, 20, was arrested Friday -- just a day after 19-year-old Daniel Robert Murti and 15-year-old Sergio Murti, two brothers, were killed in broad daylight.
Investigators are looking for a second suspect in the shooting, described only as a Hispanic male, between 18 and 22 years old, about 5-feet-6-inches tall and weighing 130 to 150 pounds.
Detectives have not yet determined a motive behind the shooting.
Surveillance footage shows the two teens walking toward the South Area Market just before the shooting. Moments later, one of the teens can be seen running in the opposite direction. A SUV follows him in the same direction.
Family of the Murti brothers said Friday that they are still in shock, and a vigil would be held later in the evening. Before news of Hoang's arrest broke, they demanded the suspects in the shooting turn themselves in.