The other way to look at it is the police may have destroyed evidence that shows Sheila was the killer'.
Would you so kind to elaborate when making serious claims.
At the time posters were saying the evidence showed Sheila was not the killer. It is natural for supporters to then say the police destroyed evidence which showed Sheila was killer.
Claiming the police 'destroyed' evidence that Sheila was the killer is a weak argument, as there is a mountain of evidence showing Sheila was not the killer.
It would have to be a big deliberate attempt by the police to remove oil, gun residue, replace false finger nails and clothes. Or get experts to falsify documents. Rather than accidental mistakes or carpet removal which you have since back tracked and claimed you're statement was saying.