Diego Marquez was 17 when he was found dead in Denver on the morning of Saturday, September 21, 2019. A worker preparing the football field at Green Valley West Ranch Park, near East 45th Avenue and Argonne Street, discovered his body about 8:10 a.m.; investigators determined the fatal shooting occurred about 1 a.m. after police had earlier received a call about gunfire but had been unable to locate a victim.

Diego’s father, Jose Marquez, described his son as someone who loved sports and had many friends; he also said Diego had been overheard in a heated conversation before his death and had mentioned wanting to move. The family and an anonymous donor put money into a reward fund handled by Metro Denver Crime Stoppers to encourage witnesses to come forward.

Four months later authorities announced the arrest of a juvenile male after an anonymous Crime Stoppers tip, but investigators said that person likely did not act alone and that at least one accomplice remained at large. The investigation is ongoing; does anyone who knew Diego or was near Green Valley West Ranch Park that night have information that could help identify the other suspect?