Trying (and largely failing) to catch up with all today's posts. This extraordinary case becomes more like a bad episode of Law & Order with every passing day. I'm not being flippant, just...you couldn't make it up.
The handling of the IE allegation is worrying. My take, and it's JMO, is that he went through a drive through exposing himself in his car. There will be CCTV of the car and perhaps of the offence, plus perhaps payment card data. If the incident had been taken seriously, it might well have been an easy matter to identify him and make an arrest, triggering a suspension. Not to say that he wouldn't still have escalated in the following days, but SE's blood specifically would not have been on the Met's hands. Presumably investigating "just" IE isn't a priority. As it is, whatever showed up on CCTV [edit: on the night Sarah disappeared] triggered his arrest, and his number plates were probably run to see what flagged up, which turned out to be the incident report from the IE. I think something like this is a much more likely scenario than a deliberate cover up, but it's damning from a PR perspective and will damage trust immeasurably. I would question whether Cressida Dick's career would survive it, and I imagine there will be a significant number of LE who will find it hard to look in the mirror afterwards.
If there could be anything positive to be taken from this case, my hope is that it will do for institutional sexism in policing and the CJ system what the Lawrence case did for institutional racism, which is to say that it will blow the lid off which crimes and which victims are prioritised and taken seriously. I feel we are in for quite a rollercoaster ride first, though.
Speculative and JMO of course.