Pima County Sheriffs say David Watson , 46 , killed his ex Linda Watson while they fought over custody of their daughter in 2000 . He was sentenced to life without parole and is currently serving a sentence at the Arizona State Penitentiary for killing her.
Pima County Sheriffs say David Watson , 46 , killed his ex Linda Watson while they fought over custody of their daughter in 2000 . Three years later , police say Watson murdered his ex mother-in-law in a drive-by shooting at the very home where Linda Watson first vanished . Marilyn Cox had been fighting for visitation rights over her granddaughter - she was gunned down alongside her neighbor Renee Farnsworth in 2003 .