Linda Watson went missing from her home in the 2600 block of West Curtis Road in Tucson, Arizona. Investigators suspected she may have been killed as there was blood found throughout her home. Marilyn Cox made it her mission to find her daughter’s killer and to find out what happened to Linda. However, she was killed in May 2003, along with her friend, Renee Farnsworth, in the driveway of Linda’s home after dropping off her then-4-year-old granddaughter. Cox and Farnsworth were shot to death, and the person they believe was responsible for their deaths, as well as Linda’s, was David Watson, a former captain with the Tucson Fire Department. David Watson, 48, was convicted of one count of second-degree murder in the 2000 death of Linda Watson, 35. He also was found guilty of two counts of first-degree murder in the 2003 fatal shootings of Cox, 63, and Farnsworth, 53.