On the early morning of Mother’s Day, May 10, 2015, 31-year-old Ernesto Santiago of the Bronx was fatally shot outside a nightclub near Post Avenue in Inwood. A brawl that began near the Tette Club escalated around 4:15 a.m., and Santiago suffered a gunshot wound to the groin. He was taken to Montefiore Medical Center, where he died; a 33-year-old man shot in the chest survived and was treated at St. Barnabas Hospital.

Police stopped a vehicle several blocks away near 218th Street and Broadway and detained three men and one woman; initial reports said charges were expected. The 34th Precinct recorded this as the precinct’s first homicide of the year.

Who has information about that night or about Santiago’s killing that could help move the investigation forward?