Well if it is in fact "policy" then Godber and Grimstone should be held accountable for something that isn't legal or just. How would have Henk behaved if Muirhead told him before speaking to him that he was going to record the conversation? I would lean towards there being a different outcome.
As it was I'd go so far to say that Muirhead was looking for a premeditated outcome. Now what stinks is that this type of behaviour by the RIU has been the norm as a follow up to their failings in INCA. It is the way Grimstone operates - he did he retire from the Police was he pushed.
If you read back through the related cases - Lawson, Dixon and Habraken Jnr you will see the same pattern as the other cases that are coming to light. Habraken Jnr put a $200 bet on for Simon Lawson. Instead of that being investigated by the RIU and dealt with by the JCA, as happens in most jurisdictions and previously in New Zealand, Grimstone and Godber sent the file to the Police under the auspices of Operation INCA. Habraken the younger was grilled in a Police interview and threatened with criminal charges!
Is there any wonder that old Henk is a bit pissed off with the RIU?