Thomas Peebles, 25, of Monroeville, Pennsylvania, was shot and killed on July 17, 2015, in Johnstown during a drug transaction at the Solomon Homes housing complex. He had agreed to sell three bricks of heroin to three men from Mount Union and McConnellsburg who traveled to Johnstown to buy the drugs.

Simmons drew weapons during the exchange and a struggle followed; Peebles was shot by Henderson and died at the scene. Stanley Leo Spriggs remained in the car; all three were apprehended as they attempted to flee toward the Altoona area. All three were charged in the killing.

What details about the night or the people involved might help explain how the transaction turned deadly?