DALLAS -- A 52-year-old man has been sentenced to life in prison without parole after being found guilty in the 2012 stabbing deaths of his estranged wife and her parents.
William Gerard Palmer was convicted Monday of capital murder by a Dallas County jury and sentenced later in the day.
Palmer in January 2012 stabbed 48-year-old Donya Palmer; her mother, 67-year-old Mary Davis; and father, 69-year-old Raymond Davis in the Davises' East Dallas home. Palmer and his wife had separated a week before the killings.
The Dallas Morning News reports William Palmer's lawyers had argued their client suffered from depression and medication caused a psychotic episode that led to the violence.
The jury deliberated less than 45 minutes before returning a guilty verdict.