Prominent criminal barrister Greg King is convinced legislation will be rushed through allowing the police to lawfully collect evidence from covertly filmed surveillance.
The Supreme Court has ruled they have no legal authority to carry out such surveillance.
Folllowing the Supreme Court's ruling that evidence gathered secretly in advance of the 2007 Te Uruwera raids was illegal, the Crown dropped charges against all but four of those arrested.
Mr King says the implications of this are significant as the police have been using search warrants to justify covert recordings and several cases have gone to the Court of Appeal challenging their legality under current law.
He says it's a legitimate type of investigative technique, but it needs the legislation to support it.
Police have said they would like a law change.