In general, LE seems to assume that the public understands that many people, including family members, friends, neighbors of the victim, and those in proximity to the crime scene, will be investigated. LE was always on the wrong track with DR, but some investigators get tunnel vision. The work of the blogger who refocused on the Paynesville assaults and ELOCsoul brought the investigation back to suspects that had a record of sexual deviancy. In all these years, nothing has come out about DR. He's just the unfortunate man who was alone in the house on the day in question. Once LE says they have a new POI, they assume that the public understands that means that others who were investigated are not involved. The FBI is not going to call a press conference to clear people. The interest in Heinrich pretty much does that.