GCSB had acted unlawfully while assisting the Police to locate certain individuals subject to arrest warrants issued in the case. The Bureau had acquired communications in some instances without statutory authority.
[Listening to a snippet on National Radio, that news broadcast ran that the problem was they were spying on New Zealand nationals and they aren't allowed to do that. If Wiki is to be believed, that would seem to be in line with their governing purpose ... but, the question remains: are they spying on other New Zealand nationals? What linkages do other government departments have with them?]