Those that have a strong belief that police were not involved will always be able to find a reason that it was not the police. If a convicted rogue police officer committed the crime there would be some that said it was just a random act of violence and the officer was just a patsy. See how that works both ways?
There is more evidence suggesting police involvement than any other logical hypothesis. Think about that for a moment. What evidence is there that excludes police involvement? There is none. The only thing that keeps people from considering police involvement is their own perception of what a policeman is and what they stand for. Take a look around the country and see the crimes that police are being convicted of, thefts, rapes, drugs, murder, and the list goes on.
The license is a big issue and no doubt it does throw suspicion on the police or police impersonator. For investigators to wait 16 years before they correct the narrative of where the license is a bit far fetched. The public has to have trust in the police and as such this would have been a small detail for them to correct in the very beginning. It would take some suspicion off of them and renew the communities belief in them. On the other hand, some will say they left the detail intentionally to catch false confessors. Ok, if that was their intent then what did JWB say when they asked him about the license? Surely it came up since it was intentionally left uncorrected to catch a false confessor. I say it again, if they pulled JB's license out and photographed it, why didn't they do the same with Tracie's? The photo of JB's license was taken where? Has anyone actually seen the original photo?