dead. his remains never found. tonight, though, just blocks away from his home in manhattan s sojo district, police and fbi agents believe they re on to something. susan canned yacht okand yaucan developments. you have some information on what led investigators to that building. what do you know? reporter: law enforcement sources tell me they came here based on new and old information that led them to a man, a man who is now in his mid-70s. but at the time he was a carpenter and part-time handyman. i m told that he had contact with this little boy in his basement, had befriended him and given the little boy a dollar. now, we don t know the circumstances about how this came about, but in fact this information led authorities to brung bring in a cadaver dog into that basement which picked up a human scent. that in turn made them bring in a team of investigators and they have been searching this basement all day long. so they re basically at this point tearing that basement