kathy lange: well, it was scary. very personal to him because they were really attacking his home. kate snow: but the family of those intruders, they were in shock. i didn't believe it. i thought it was completely not right, or untrue. kate snow: teenage cousins nick brady and haile kifer had gone missing the day before, thanksgiving. now, as she learned the circumstances of her son's death, nick's mother had so many questions. how do you reconcile in your head your beautiful boy who loves the outdoors and what they're telling you, that he broke into somebody's house? i just-- i couldn't imagine it. it just was so not him. so you just couldn't reconcile? yeah, i just-- i had a lot of trouble kate snow: kimberly had never heard the name byron smith, but rachel had. i knew that my brother had worked for him in the summer, but i didn't know him at all. kate snow: nick had once done yard work at byron smith's house. now, the sheriff had evidence of what he was doing there again. byron had set up surveillance cameras at h