dave gillem called in for his uncanny ability to plumb a cell phone for almost anything it's ever done. on abby simon's iphone, that was not an easy thing to do. >> she had erased most of the text messages between her and the victim, and i was able to recover many of them. we don't know how many there were. but we did recover thousands and thousands of text messages. and this is material that had been erased, material she chose >> correct. to you? >> she was hiding it. she knew it was not something she would want people to see, and so she deleted it. >> reporter: the sun soon set on another school year. abby moved back to her parents' place, a two-hour drive from grand rapids. summer came. and then the detective discovered that her no-contact order wasn't enough to keep abby simon away from her teenaged lover. >> she tweeted him and gave him the information on how to contact her because i had her phone. so he couldn't call her anymore or text her anymore. she had changed phone numbers. but somehow he was able to e-mail her and call her. >> reporter: and at least once they managed to me