. >> she told us about scott eby. >> who is scott eby?ll me what kind of person he is. >> a creep. >> the summer that riley fox disappeared, scott wayne eby was 33 years old. he'd been married, in and out of prison. he was l wiinonith his mother. it turns out he was living with her one mile from the fox family home. >> they'd had a very peculiar conversation when they were out for a walk together, walking through riley's garden. >> i was saying, i can't believe somebody did that to a sweet little girl. and he said, oh, that was such a shame, wasn't it. and the way he said it was like -- cold, like he didn't mean it. >> she told us she knew he was incarcerated for sexual assault of a family member. >> scott eby was five hours away, in prison. i asked jeremy, let's go ahead and try to get this guy interviewed. he was very respectful, very responsive to our questions, didn't hesitate, didn't seem nervous. >> he was just trying to kind of collect his thoughts as to why in the world the fbi is here to talk to me and what i should do about that

. >> she told us about scott eby. >> a guy by the name of scott wayne eby. >> you knew a guy named scott> the summer that riley fox disappeared, scott wayne eby was 33 years old. he'd been married, in and out of prison. he was living right there in wilmington with his mother. and it turns out he was living with her one mile from the fox family home. >> they'd had a very peculiar conversation when they were out for a walk together, walking through riley's garden. >> and he'd made some comment that left her chilled. >> i was saying i can't believe somebody did that to that sweet little girl. and he said, oh, that was such a shame, wasn't it? like, cold. and the way he said it was, like, cold. like he didn't mean it. >> she told us that he had since moved out of town and she knew he was incarcerated for a sexual assault of a family member. >> scott eby was five hours away in prison in southern illinois. i asked jeremy, hey, let's go ahead and try to get this guy interviewed. >> it was way in the southern portion of the state. it was -- it was a hike. >> in all honestly, he was someone i was