hair and beautiful smile becoming the face of missing kids across the country. thousands of flyers were plastered across new york city, buildings, canvassed hundreds of people interviewed back then and the search expanded worldwide and over the past three decades ten detectives were assigned to head up the search and we have seen times when they thought they had a break, only to have the case go cold again and now, after a decade of relative silence, a cadaver sniffing dog picked up on a scent in an old basement down the street. authorities ripping up concrete with jack hammers and saws and we watched it and carefully setting the piece aside hoping they ll find any answer. our reporter is live in soho in new york city looking into this. anna? reporter: harris, investigators are wrapping up a third day here for the first time, they begin digging into the soil beneath where the concrete that you mentioned had been, we re told they will be going 4-6 feet below where the basement was and