On May 22, 2019, 23-year-old Omar Martin was fatally shot during a dispute aboard an eastbound MetroLink train in St. Louis County, Missouri. The train was approaching the St. Charles Rock Road station near Pagedale at about 11:50 a.m. when Martin became involved in an altercation with another male passenger. As the train stopped, the other man produced a firearm and shot Martin in the abdomen.

The shooter exited the train and fled on foot, reportedly discarding the weapon in nearby bushes. Emergency responders transported Martin to a local hospital, where he was pronounced dead shortly after arrival. Witness descriptions helped investigators identify a suspect.

Police arrested 21-year-old Isaiah Liddell of St. Louis on May 31, 2019. Prosecutors charged Liddell with second-degree murder, armed criminal action, and tampering with physical evidence, and a judge set bond at $250,000 cash only. Did anyone witness that train ride or see someone fleeing near the station that morning?