In the early morning hours of March 6, 2016, a party in a vacant apartment on Washington Avenue in Chelsea, Massachusetts turned deadly when gunfire erupted. Nineteen-year-old Pablo Villeda was shot and taken to a local hospital, where he died. Six other people, ages 15 to 22, suffered non-life-threatening gunshot wounds; another person was injured in a way not related to the shooting.

Investigators identified 16-year-old Emanuel Marrero of Lynn as the sole shooter and he was arrested the night after the incident. Reports say a dispute that began on social media between Marrero and Villeda preceded the shooting and that Marrero displayed a .40 caliber handgun at the gathering. Marrero was charged with murder, armed assault with intent to murder, and weapons offenses; a separate teen, 16-year-old Efrain Vega, faced a firearm possession charge connected to the case.

Anyone who was at the March 6, 2016 gathering or has information about the events that led up to the shooting is asked to come forward.