the only remaining suspect was jeremy rosser. were finally able to locate him through his ex-wife, who provided an important clue. she said jeremy had shown signs of violence at the time of their divorce. >> they got in an argument, he shoved her to the ground, and while she was on the ground he kneeled over her, put both hands around her neck. >> coincidentally, this incident occurred right around the time of jenna's murder. but for investigators, there was still one problem. >> a criminal check was done of rosser's background and we found no instances where he had been arrested in the past. this made him somewhat of an unlikely candidate for a crime of this type. >> when police questioned rosser he denied any involvement and was happy to cooperate. but in rosser's truck, investigators found a laptop computer. the serial number was traced to a tenant living in jenna's apartment complex who'd reported it stolen months earlier. they also found rosser still had keys to the apartments. >> this indicated to us that rosser had likely