keith morrison (voiceover): and then the prosecution called holly's old friend, rebecca vega. 's life after matt, it was rebecca. keith morrison: how was it to actually be in that courtroom, see her there and answer those questions? couldn't even look at her. keith morrison (voiceover): rebecca told the jury, holly didn't wait long after matt's death to remove any trace of him from their house. it seemed as if everything that-- of being of matt had been taken out of the home. keith morrison (voiceover): but it was what holly hadn't cleaned up that make the biggest impression on rebecca-- those bottles of chemicals on the kitchen floor. what was holly's response when you asked her about those items? one of the items was brought up as antifreeze for matt's boat to winterize his boat. keith morrison (voiceover): but who winterizes their boat in the summer? remember, matt died in july, said the prosecutor, so rebecca's story was evidence that holly had access to antifreeze around the time of matt's death. she was able to put antifreeze in the kitchen of holly mcfeeture after the de

rebecca vega: how could this happen? a very healthy 31-year-old just winds up dead?son (voiceover): a young father's death so sudden, so strange. we wanted answers. the word "poison" just kept coming up. it was antifreeze poisoning. you can't smell it.