Jurors found Shawn Shirck, 29, of Oak View guilty of involuntary manslaughter on two counts in the stabbing deaths of Margaret Dahl, 59, and her mother, Phyllis Porter, 82, in
Jurors found Shawn Shirck, 29, of Oak View guilty of involuntary manslaughter on two counts in the stabbing deaths of Margaret Dahl, 59, and her mother, Phyllis Porter, 82, in