Trevon Chapple was 17 when he was fatally shot in Saint Louis on the evening of January 30, 2016. According to reports, he was a passenger in a car during an attempted robbery by another teenager who produced a firearm. Chapple tried to flee and was found dead on a sidewalk from a single gunshot wound to the head.

Investigators charged a 17-year-old suspect, Montrell Jeffery, with first-degree murder, attempted robbery and two counts of armed criminal action; a cash-only bond of $1 million was set. Prosecutors said Jeffery tried to take Chapple’s handgun and pointed to witness testimony and a social media video showing Chapple, Jeffery and the witness together hours before the shooting.

In August 2017 a St. Louis jury acquitted Jeffery on all counts, with the defense challenging the witness credibility and the strength of the state’s case. Does anyone have information about Trevon’s last hours or the people who were with him that night?