Diego Serna was 16 when he was killed in a November 2, 2017, shooting in Gary, Indiana. A student at the Hammond Academy of Science and Technology, he and another young man went to the 400 block of South Huntington Street for what investigators say was a purported marijuana transaction. A masked assailant ambushed them and opened fire; Serna died of gunshot wounds and the other victim was seriously injured but survived.

The investigation stalled for years and the case became a cold file, complicated in part by the involvement of a former Gary detective who later faced unrelated federal charges and imprisonment. Authorities eventually identified multiple suspects and prosecutors pursued charges in the years afterward.

If anyone knew Diego, saw activity on South Huntington Street that day, or has information about the ambush, please come forward to help bring clarity to this case.