On the evening of June 16, 2021, 29-year-old Katherine Diop attended a graduation cookout in Fordham Manor, Bronx. She left the gathering with her 31-year-old brother Maurice to buy lighter fluid at a deli on Marion Avenue and East 194th Street. An argument over music outside the store escalated and gunfire followed. Katherine was struck in the torso and died at Saint Barnabas Hospital; her brother survived after being shot multiple times.

Katherine is remembered as a devoted mother to a 7-year-old daughter and a beloved daughter and sister. The NYPD investigated the shooting and arrested two men the following month: 24-year-old Jonathan Rosario on July 11, 2021, charged with murder, attempted murder, manslaughter, assault, weapon and controlled-substance counts; and 28-year-old Andrew Johnson on July 22, 2021, charged with murder, attempted murder, manslaughter, assault and two counts of criminal possession of a loaded firearm.

Did anyone at the cookout or nearby that night see what sparked the argument or the shooting?