Seth Morrison Bishop was 18 when he died at the family home in Braintree, Massachusetts on December 6, 1986. The death was originally ruled an accident after Seth was fatally shot in the chest; his 21-year-old sister Amy was the person holding the shotgun and told authorities the gun discharged while she was unloading it. The only other eyewitness was their mother, Judith Bishop.

In 2010, after Amy Bishop was arrested in Alabama for a separate deadly shooting at her workplace, Massachusetts investigators reopened Seth’s case. New details emerged: after the shooting she fled the house with the shotgun, went to a local car dealership where she brandished the weapon and attempted to take a vehicle, and only surrendered the gun after police orders. Those facts had not been forwarded to the district attorney in 1986. A Norfolk County grand jury indicted Amy Bishop on first-degree murder in June 2010, overturning the original accidental ruling.

Anyone who knew the Bishop family or has information about the events of December 6, 1986 is asked to come forward.