The murders took place in the wee hours of the morning not long after two of the girls got home after visiting the food truck. Seems to me they would have been calling it a night and the male and female couple were reportedly out at a different party on campus but I don’t recall hearing what time they arrived home. So who was it that was partying in the house?
That was an assumption on the girls in the room. The heard loud noises and maybe other sound, can’t remember if they said music, but they locked their door and went to bed. Might have saved their lives.