Sentencing is set for Thursday for John Wayne Noonkester, who was found guilty of first degree murder last month for gunning down his ex-wife and her father in a Tehama County store.
The shooting happened outside a Lake California store two years ago.
Noonkester faces life in prison without the possibility of parole for the brutal attack in July of 2015.
His ex-wife 29 year old Kimberlee Thomas and her 53 year old father Keith Thomas were killed.
A bystander 25 year old Anthony Maitias of Cottonwood was also wounded.
Noonkester's attorney argued during the October trial Noonkester simply snapped mentally before pulling the trigger and did not deserve a first-degree murder conviction.
In the end, a four-woman, eight man jury agreed Noonkester planned out the cold blooded attack.