She told police one man led her through the house searching for the item, and when they returned to the living room, Cynara was lifeless on the couch, with the other man standing nearby, holding a pillow. The men left, claiming they had the wrong house, and were never found.
I can see why she was viewed with suspicion, given her story. But I agree that the cops had a duty to check for fingerprints and dna if they wanted to disprove her story.