In the case of the NSW Law Enforcement Conduct Commission (LECC), its conduct is inspected by a separate agency known as the Office of the Inspector of the Law Enforcement Conduct Commission (OILECC). And OILECC's conduct, in turn, is reviewable by the NSW Ombudsman. And all three (LECC, OILECC and the Ombudsman) are overseen by a parliamentary committee.

and how's that working out for these unfortunate folks?

Who are "these unfortunate folks"? Kristo Langker?

As I said above, LECC isn't going to investigate the arrest of Langker while Langker's criminal prosecution is pending. In the event that Langker is acquitted or the prosecution otherwise discontinued, it is possible then that LECC will investigate. We can't judge LECC based on this episode because legally it is too early for it to be involved.

no, you said it was "unlikely"

all this aside, how about some sympathy for innocents caught up in this unconstitutional dragnet? does the 4th amendment even exist anymore once the feds get involved?

What are we talking about here? The article about the FBI seizing $900K from a safe deposit box? Or Australian police arresting the producer of a YouTube comedian? I said, with respect to the second, that LECC was unlikely to investigate while the criminal case was still pending. That has absolutely nothing to do with "the 4th amendment" – the US constitution does not apply in Australia.