Conspiracy theorists, unlike normal people, find it easy to believe that people will expend enormous effort to create an illusion. I'd like to take this opportunity to say we told you so.
There was no conspiracy here - just the work of one lone man.
Nobody will deny the existence of individual liars and charlatans.
One person acting alone is not a conspiracy. It takes two to both tango, as well as conspire.
The question isn't "does it happen", the question is "how common is it?". If a normal person is dealing someone who seems to have an "everything is always a conspiracy" worldview - then "that stuff doesn't happen" can be both an assertion that the non-normal is nuts, and that the very frustrated normal just wants them to shut up and go away.
In the case, the purported conspiracy was that the powerful forensic pathologist was protected by a shadowy elite