Mark Lancaster, 39, of Kingston, New York, was shot and killed after pursuing a car that had just been used to rob his son during a prearranged marijuana transaction at Sawkill Trailer Park on December 1, 2018. Stansberry Sr., armed with a nine-millimeter pistol, pointed the gun at Lancaster’s son and took the drugs before the three fled in a car driven by Stansberry Jr.

Lancaster followed the vehicle for about a mile and a half, cut them off on Sawkill Road, and—unarmed—approached the suspects’ car to demand his son’s property. During that confrontation Stansberry Sr. shot Lancaster in the lower abdomen; the wound caused fatal internal bleeding. An Ulster County Grand Jury later indicted Stansberry Sr., Stansberry Jr., and Gardener on felony murder, robbery, and weapons charges. Gardener pleaded guilty to felony murder, Stansberry Jr. cooperated as part of a plea deal, and a jury found Stansberry Sr. guilty of murdering Lancaster.

If anyone knew Mark Lancaster, his movements that day, or has information about the robbery and shooting, please share what is known with investigators.