Iowa son fights to prove his father did not kill his mother with Trysten Mullis was 13 when he found his mother Amy Mullis impaled with a corn rake at the family's Iowa farm.

Iowa son fights to prove his father did not kill his mother with Trysten Mullis was 13 when he found his mother Amy Mullis impaled with a corn rake at the family's Iowa farm. Trysten Mullis was 13 when he found his mother Amy Mullis impaled with a corn rake at the family's Iowa farm.