A neighborhood barbeque in Hatfield, Pennsylvania on July 22, 2017 ended in tragedy when 31-year-old Jeremy Chasteen was shot and killed. Chasteen and his wife, Felicia, were at a party hosted by Derrick and Whitney Cosby on East Orvilla Road. An argument between the Chasteens escalated after Felicia said Jeremy appeared too intoxicated to drive. Other partygoers intervened as the couple returned inside the Cosby home.

According to Derrick Cosby’s account to dispatch, he saw Jeremy strike his wife and retrieved a .45-caliber handgun. Standing about five feet away, Cosby fired one shot that struck Jeremy in the head. Police found Chasteen deceased in the family room; the autopsy listed cause of death as a gunshot wound to the head and the manner as homicide. Felicia Chasteen initially said she did not see who fired.

Derrick Cosby was arrested and charged with voluntary manslaughter and possessing an instrument of crime; his defense cited Pennsylvania’s Castle Doctrine. A Montgomery County jury acquitted Cosby after about two and a half hours of deliberation in February 2019. Did anyone at the party see what led to the shooting or have information about the moments before the shot was fired?