fdle handed over the results of their investigation to the local prosecutor, r.j. larizza.tigators from his office soon asked the o'connells' permission to investigate even further. >> at one point, they say to my mother, "we may need to exhume..." ...my sister's body. >> and i immediately said yes, because i knew, i said, "they're gonna find something that's missing, that they overlooked." and they said, "fine, we will get in touch with you, we will give you papers that you have to sign." weeks go by, nobody calls me. >> narrator: behind the scenes, the case was unraveling. though he declined to be interviewed on camera, dr. hobin told us that larizza asked him to hold off from filing the amended homicide finding because the case was about to take a new direction. and then larrizza asked to be recused, citing his office's close professional relationship with the sheriff's office. >> now all of a sudden he wants out of the case, and it makes us think, "what's going on? why do you want out?" nobody understood that. why didn't he recuse himself day one if it was a conflict of