On May 15, 1999, 19-year-old Walter Gallegos was shot and killed after a disturbance at a large house party on Quivas Street in Westminster, Colorado. According to investigators, the shooting occurred as Gallegos ran from the garage out into the street; a single gunshot proved fatal.

Westminster Police identified someone who lived at the residence as a suspect based on their investigation and witness statements. Efforts to formally identify the suspect stalled when witnesses were unwilling to cooperate, and prosecutors did not have enough evidence to file charges. The case subsequently went cold and remains open.

Anyone who attended that party or has information about who was present that night is asked to come forward.