Ousmane Diallo, 24, was shot and killed by a gunshot wound to the head in a Harlem apartment in the early hours of July 18, 2026. Diallo worked as legislative director for New York State Assemblymember Al Taylor and was active in the National Action Network from his teens; colleagues and community members described him as a rising, respected figure in public service.

Police responded to 911 reports of a shooting at the Frederick Douglass Boulevard residence and found Diallo deceased and his brother, an off‑duty NYPD officer, in the apartment. A firearm was recovered and was later reported to be the off‑duty officer’s service weapon; the officer was suspended. The New York Attorney General’s Office of Special Investigation opened a probe because an officer was involved. No arrests, charges, or identified suspects have been publicly announced.

What can readers who knew Ousmane or were in that building on July 18 share about his last known movements or any other details that could help clarify what happened?