You had just gone out with your other friends to the movies. When you finally reach the Addison Apartments, you could see blue and red flashing lights, as if the police were there. As you walk up to the apartments, you could see Sal, standing at the door, completely covered in blood. He was muttering the words "I had no choice" over and over again. Sal continued to stand there, almost frozen, not being able to look at anything but the ground. It seems he had killed everyone but you because you weren't there.