Vallen Davies-Mack was 17 when he was found fatally shot at Collingswood Playground in Swissvale on May 18, 2017. He was discovered face-down with multiple gunshot wounds to the back and was pronounced dead at the scene after a passerby reported the unresponsive body early that morning.

The investigation led to the arrest of 19-year-old William Henry Smoot of Pittsburgh, who was charged with homicide, robbery, reckless endangerment, and firearms violations. According to the criminal complaint, Smoot and two others had been together in Wilkinsburg before a drug deal was arranged for the playground; a witness said Smoot pulled a gun on Davies-Mack when he arrived and one of the others fled after the shooting. Smoot was arrested December 6, 2017, but after a 3½-day trial a jury acquitted him of all charges on August 26, 2019.

Are there people who knew Vallen or who were at the playground that morning and can share details that might shed light on what happened?