TUCSON (KGUN9-TV) - Former Tucson Firefighter David Watson is on trial for the murders of his first ex-wife, her mother, and her mother's friend.
On day two of the David Watson trial, the testimony of his second ex-wife continued.
Rosemary Watson took the stand for a second day after retracting David's alibi under oath.
In 2007, after they divorced, she went to detectives saying he went out for a walk instead, the night of Linda Watson's disappearance.
Linda's mother, Marilyn Cox was killed three years later, after Rosemary says the couple fought with her over custody of David's daughter.
Rosemary Watson broke down in tears as she talked about why she decided to retract her prior statements about David's alibi the night Linda disappeared.
"I had a lot of internal conflicts prior to the actual calling. I mean it's something that I have fought with. Guilt and shame and confusion and fear," said Rosemary.
Later in the testimony, Rosemary recounted a day when David was distant with her and she threatened to divorce him.
"He took off his sunglasses, he kind of leaned in and said don't **** with me. And I said don't **** with me. And that was that and for some reason at that moment, I don't know why it was that moment, it just chilled me to the bone and everything, everything just came flooding back and I knew that I could not hold this in any longer because three women lost their lives and their lives mattered."
The defense attorney challenged Rosemary Watson's changed story of what David Watson did the night of Linda Watson's disappearance.
The trial will continue tomorrow at 10:30 a.m. with Rosemary Watson on the stand for cross-examination.