John Mapp, 40, of Philadelphia died on July 20, 2014 after being shot during a violent family dispute at the family home on the 5800 block of Filbert Street in West Philadelphia. John staggered out of the house and collapsed in the street; paramedics took him to the Hospital of the University of Pennsylvania, where he was pronounced dead. Deena received treatment for her injuries.

The dispute was described as unexpected by the family, who had spent the previous evening together; the immediate trigger for the fight remains unclear. Anyone with information about this July 2014 incident or who knew the family is asked to come forward.