Confusion 1 part 2: Paulina

Paulina returns from her errand; it seems everything has calmed down now, or so she thought. She finds her friend Miriam in her underwear for no apparent reason; she starts shaking her, but Miriam doesn’t respond. Frightened, she begins to shake her harder; suddenly, the very same man who killed Miriam attacks her from behind. She struggles to try and escape, but her efforts are in vain; Paulina dies, and just as she is examining the body, she finds the USB stick. It seems there’s no need to look any further, it was just a terrible misunderstanding.