Looking at the issue of false accusation more broadly, there is the issue of Dwayne Brooks.
https://en.wikipedia.org/wiki/Duwayne_Brooks
That was 34 years ago and, thankfully, a lot has changed in that regard since then!
If you have to go back that far to prove your case it is a pretty weak case.
I do not, and will never, argue that all coppers are perfect, you only have to look at the idiot in the latest two rape cases to see that is, unfortunately not true, but nor will I, as you appear to be doing, make out that they are all bent!
OK, the processes for dealing with the rotten ones is under review and knowing the new Commissioner of the Met some coppers are goig to come a cropper - but not ALL coppers!
And as with a lot of thinbgs you throw enough shit and some sticks ecven to t he inmnocent.