I don't see what they have to lose by having a review and looking at alternative possibilities
Face.
The police never solved the case. But for the last 22 years, they have been saying they
did solve it, that it was JC, and it's only because of those bureaucrats at the CPS that JC hasn't been prosecuted.
What the police have that we do not is the file that DV sent them on the case. It seems highly likely that this makes them look like utter amateurs. Therefore they can't admit that anything in it could be right.
DV's dossier, as opposed to his book, probably starts by asking where SJL might have been going. It then perhaps notes that the list of places is known and quite short: 37SR, Stevenage Road, her home, or the PoW. OK, and all those places were searched at the time, right? Er, wrong, notes the dossier. The PoW was never searched. Why not? Well, let's see why not...what did the staff at the PoW tell us at the time? Er, so this bloke who looked a bit like James Galway said SJL never turned up. So that's all right then.
Well, pfffffffft, if someone there killed her, they
would say that. So we don't just swallow that, do we?
Oh. Wait....we did.
I reckon DV's dossier simply points out that an obvious place never was searched, and patently should have been. He doesn't even need to get into debunking the Kipper theory to be right about this. This was an obvious and appalling procedural omission.
All the Kipper-Schmipper, 37SR etc is largely beside the point. Circumstantially it's pretty obvious she did not go there. But if the pub is searched and she's still there,
that's how we'll know for sure. We don't get there by proving what happened to the keys. That's just yet another detail the police should have grasped in July 1986.
This makes the police look appalling, so to deflect it, they need to reiterate that the Kipper story is true, and they need to defend the failure to search the PoW as justified and correct. Both of these lines of attack are, I suggest, in plain view. The police are still doubling down on searching places related to JC, and they're insisting that they don't need to search the pub because there was no motive; because DV needs to prove there was something salacious in the diary; because there are no witnesses; and so on. They're doing what you'd expect; they're dying in a ditch defending their hopeless case.
DL was successful at getting the police to do whatever she wanted done - fatally for the inquiry - but the surviving family now are content to leave this with the police. I think the only way this gets resolved is through political intervention by the mayor or Home Secretary.