On April 18 , 1970 , a Superior Court jury in Los Angeles found Beausoleil , aged 22 , guilty of first - degree murder .
On April 18 , 1970 , a Superior Court jury in Los Angeles sentenced him to death .
On April 18 , 1970 , a Superior Court jury in Los Angeles found Beausoleil , aged 22 , guilty of first - degree murder and sentenced him to death .