I'm natalie morales. mary burr harshbarger, i'm husband, mark, love to hunt and shoot. they were both excellent marksman, able to hit targets with precision. while on a hunt for a bear, one night, mary beth took aim and pulled the trigger. but, which he shot was not a bear. it was her husband. was it a tragic accident, or murder? once again, here's keith morrison. >> in those said, dark days after mark harshbarger's death. his family suspicion solidified. his wife, mary beth, they were convinced had murdered mark. they told whoever would listen -- up in the newfoundland woods. >> his family wa...