>> microscopically, it was the pattern that the threads had that were able to give me that distinguishing or that unique appearance that associated with the bedding material. >> also in maria's apartment, investigators found a video camera and keys to a ford truck. the video contained images of michael andrade's family, proof that the camera was michael's, and the car keys were michael's, too. >> michael andrade's truck was a ford f-150 and these keys were ford keys. went down with the alarm remote on the set of keys and opened up his truck. >> investigators confronted maria solis and wanted to know who owned the men's jeans found in her hamper. after she was threatened with prosecution, maria solis changed her story.