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up the hill -- "follow me, guys" and the dog led them up there -- >> reporter: this hill right here?" >> right here. and went up into the back of the property. >> reporter: jack bounded up and down the hill, until police followed him. and there -- they found something shocking. a mound of disturbed dirt. they began to dig. cher's husband keith waited at the bottom of the hill. >> the police went up with shovels, and then they came down, about two hours later, and said, "we need you to come up and take a look. >> reporter: in a shallow grave -- hidden under a mound of garbage, the police made a horrible discovery -- the body of cher hughes. she had been shot once in the back of the head. i imagine that was one of the hardest days of your life. >> yeah. it sure is. i mean, no -- no one should ever see someone they cared about look like that. >> reporter: now, keith finally understood why jack kept swimming to bill's place. >> he'd swim that mile back and just stay right there. he was staying true to mommy.