On the evening of October 1, 2016, fire officials responding to a reported gas leak at a Fulton Avenue home in the Bronx discovered a far grimmer scene: the bodies of 50-year-old Sharon Epps and her 27-year-old son, Tyrell Bell, both fatally shot. Tyrell worked as a transit worker.

Investigation attention quickly turned to a longterm household member. Authorities arrested Antonio Robinson, Sharon Epps’s longtime boyfriend, who had lived with the family for more than two decades and had helped raise Tyrell. Police records indicate officers had been called to the residence for domestic incidents in the years before the killings, and friends reported Robinson had frequently threatened Tyrell.

Robinson was charged in the murders. What details are still unclear about the events that night, and can anyone who knew Sharon, Tyrell, or Antonio provide information that hasn’t been shared publicly?