Mark Lammons was 26 when he was fatally shot in Chester, Pennsylvania, on the night of July 22, 1987. The shooting occurred in the city’s West End at the corner of Third and Ward streets after what was described as a minor street argument that escalated into deadly violence.

Investigators focused on a 24-year-old man from Chester. A jailhouse informant held on unrelated charges identified that man as the shooter; prosecutors cited that testimony along with other evidence when the local District Justice filed criminal homicide charges. The case then moved forward through the legal system with the informant’s testimony a key part of the prosecution’s presentation.

Does anyone who lived in Chester in 1987 remember the incident or have information about Lammons, the location, or the people involved?