Dyon Thompson, 28, of Philadelphia, was fatally shot outside a residence on Chain Street in Norristown, Pennsylvania, on February 27, 2022. The shooting occurred during an altercation after Thompson arrived to speak with Niearah Avery, the mother of his 7-year-old daughter; Avery was eight months pregnant at the time. Witnesses said multiple shots were fired as 27-year-old Tymeir Henderson walked back toward a car, killing Thompson and wounding Thompson’s 19-year-old brother, Quadir Miller, who was shot while trying to flee.

Investigators from the Norristown Police Department and the Montgomery County Detective Bureau processed the scene and interviewed witnesses. The inquiry found Henderson had handled Avery’s legally owned 9mm handgun, although the firearm was not recovered at the scene. Henderson was arrested and charged with first-degree murder, third-degree murder, aggravated assault and other offenses; he later admitted the shooting, pleaded guilty to third-degree murder and aggravated assault, and received a 30 to 60 year prison sentence. Henderson expressed remorse and apologized to Thompson’s family during court proceedings.

If anyone knew Dyon, Quadir, Niearah Avery or has information about the events on Chain Street that night, please share what you remember.