I think that is a fair summing up, Iam64.
This case is under investigation in more ways than one; the main one will be to find the culprit(s) and bring them to justice and to construct a water tight case to ensure a conviction, which could be hampered by the fact that the crime scene was compromised by those searching and also the two rogue police officers themselves.
If the police force is, as a body, institutionally racist then I do not think that those police officers would have been dealt with as swiftly as they were and will need to be if that were the case.
There will also be investigations, I would think, into why a search was not undertaken when the women were first reported missing and into whether or not this would be normal or unusual procedure.
Until then, anything else is just conjecture, much of it fanning the flames.