On November 19, 2018, four people were found shot to death in the basement of a Malcolm Street home in Philadelphia: 20-year-old Tiyaniah Hopkins, her 17-year-old sister Yaleah Hall, 31-year-old William Taylor, and 28-year-old Akeem Mattox. A family member who went to check on one of the victims found the door ajar and summoned police. Investigators described each victim as having been shot once in the head in what they called execution-style killings; there were reportedly no signs of a struggle and it appeared the victims had been led to the basement.

Police say the slayings grew out of a drug deal that turned into a robbery. Taylor and Mattox, described as stepbrothers who had been renovating the house, allegedly intended to sell a quantity of drugs; the buyers were reportedly robbers. Tiyaniah and her sister are believed not to have been involved with the transaction and were killed as witnesses.

Authorities say four Philadelphia men were identified and arrested in connection with the case and charged with murder, robbery, criminal conspiracy and related offenses. Did anyone in the Malcolm Street area know the victims or see anything unusual around November 19, 2018?