Kaylissa O’Leary was 17 and a senior at Copper Hills High School when she died from a gunshot to the forehead at a Taylorsville house party on the night of August 24, 2019. A .380-caliber shell casing was found several feet from her body. Initial reports suggested a self-inflicted wound, but the case was quickly treated as suspicious after most partygoers—reported to be at least eleven people—fled and Kaylissa’s blue Honda Civic was missing for several days.

Investigators later pursued digital leads, seeking access to multiple Snapchat accounts tied to attendees. One witness described Snapchat stories posted shortly before the shooting showing two people posing with guns. Another attendee said they heard Kaylissa was playing with a gun when it went off and alleged that seven people left immediately afterward and took the gun with them. Despite interviews by the Unified Police Department, no arrests or publicly named suspects have been announced and it remains unclear whether the death was accidental or a homicide.

Did anyone attend that party or know any of the teens who left the scene and could help clarify what happened?