A way to the local PD’s feet to the fire. I am sure they just wish it would go away. They may have no real clue who did it or worse still know who did it but don’t have indictable evidence. Read ‘The Girl on the Volkswagon floor’ for a case in Dayton Ohio where the cops know who the killer but can’t nail him , or the case of Vista Volunteer Nancy Morgan where the victim’s killer has been taunting the local cops for years.
and cops get mad when they cant solve a case...they love patting each other on the back, and dont like to look bad. ive read books on how badly the L.A.P.D Robbery/Homicide division screwed up the Manson Murders in 1969...and mainly out of purely being stubborn. Any fool could see that the Tate homicide and the LaBianca killing the next night ..that they were connected and done by the same people. 2 days into the investigation, LA County Sheriff Homicide even contacted LAPD with the similarities with other crimes in the area, and were told to take a hike...they were convinced the Tate killings were “drug” related..if it wasn’t for Susan Adkins running her mouth in jail 3 months after ...they probably never would have solved that horrible crime...