A 16-year-old cold case heads to trial Wednesday. Former Tucson Fire Captain David Dwayne Watson is going on trial for the deaths of three women, including his ex-wife.
After opening statements, we will hear from David Watson's ex-wife. Her account of what happened is expected to be a very important piece in possibly disproving Watson's alibi about where he was when the murder of Watson's first wife took place.
Back in 2000, Pima County Sheriff's Deputies investigated Watson's first wife Linda's disappearance . She was in a bitter custody battle with David Watson over their daughter. Linda Watson's disappearance lead to her mother, Marilyn Cox, seeking justice and doing media interviews, including sitting down with KGUN9.
Fast forward to May seventh, 2003: Cox and her neighbor were gunned down in a drive-by shooting at the very home where Linda Watson disappeared. Her mother had moved in since she vanished.
In 2009: Bones were found near the Tucson Mountains.
In 2011: The remains were confirmed to belong to Linda Watson.
April 2015: Deputies arrested 47-year-old David Watson at his home. He's charged with three counts of first-degree murder.
READ MORE: Background on David Watson cold case
One of the key witnesses in this case and the first person to testify is Rosemary Watson, who was married to David Watson when Linda Watson disappeared. She originally said David was home at time of the murder, but it was later revealed he "went for a walk."
The trial is supposed to take three weeks. There are 85 witnesses testifying including Watson's daughter and his ex-wife's son.