She recognized the number on the door as the one she was supposed to be coming to. Also this apartment was the one the crashing sounds seemed to have come from.
Standing so close she could now hear the noises of someone talking on the other side of the door. Normally it's not in her nature to eves-drop or even peek into other people's rooms or homes.
In her defense, as much as she could make out the conversation, she felt it suspicious.
Surely just a fleeting, innocent little peek wouldn't make her a horrible person, right?
So switching her flash light out as there was plenty of light inside, she took a peek inside from the slight opening of the front door and came face to face with a scene that left her mouth more ajar than this door.