Capt. James Clark, of the Philadelphia police homicide division, said Monday that the girl and her six siblings — who range in age from seven months to 13 — were in the bedroom of the Kensington home when Phillips came into the room, took his gun from its holster and started "carelessly and recklessly waving and pointing the gun around in the room." The gun went off, striking the girl in the back of her head, "killing her instantly," Clark said.