and that was chanin's ex-husband, clay starbuck.itely making clay starbuck look like a stronger suspect than ever. narrator: but how to prove it? for that, detectives turn to one of the few lucky breaks they had in a very difficult case. chanin had just gotten out of the shower before this happened. narrator: and if chanin was strangled after she showered, this would be fresh dna almost certainly deposited on her neck at the time of her murder. because dna technology over the years has gotten more sensitive, we can now develop dna profiles from just a few skin cells. so, six or seven cells, we can get a dna profile. narrator: using a process called y-str dna, which targets the y chromosome confined to males, analysts lifted a dna profile from chanin's neck and face. the profile matched the "y" profile for clay starbuck and any of his male children. narrator: two of the starbucks' children were adult males, and both had solid alibis for the time of the murder. that left only one person -- clay starbuck. the dna profile that we got le