department, and told them -- decided to tell them that, hey, they killed him. >> based upon frederick borden'sthe disappearance of the child. >> it was relayed to us while frederick was in jail that he said my mom confessed to him that her and jason killed nicholas and hid the body. >> because they accused me first. it totally freaked me out, because i -- i have been crazy but never violent. >> this is the street the kid lived on when he went missing. here's the house right there. i think the boy's buried here. i want to talk to darrell inside. he's agreed to let me dig and see if nicholas barclay is here. >> if beverly knew that this individual was not her son, then she had to have some type of ulterior motive, and it had to be something very scary for her to accept a stranger into her household posing as her own son. >> i agreed to take a lie detector test. >> she passed the polygraph, and i said to the polygraph examiner, i don't understand this. i don't understand it at all. will you give it to her again? so he gave it to her again, and she passed the polygraph. i said, no, there's somethi