Milwaukee Police arrested a 23-year-old man in Milwaukee and a 32-year-old man in Chicago.
Justin was visiting his grandmother before going on a fishing trip with his stepfather when the shooting happened. He stepped out of the car to tell his mom goodbye, but was struck by bullets before he made it past his grandmother's doorway.
The next day, hundreds marched chanting for justice in the name of all innocent children losing their lives to gun violence.
According to MPD, since 2012 nine children have been murdered by gun fire in the city of Milwaukee. Justin was the 10th.