He said it was possible Crown Law had been kept in the dark and it had been "gazumped" by the FBI ahead of the proper court hearing.
Mr Akel said police were operating under a legal direction to keep "custody and control" of the items seized by search warrant.
"If a copy is made and that copy is allowed to make its way to a third party ... then the person in charge of custody and control has lost control."
He said doing so would be an "illegal act".
The key dates in the debate fell in late March. On March 22, North Shore District Court judge David Harvey - who will hear the extradition case - had given the lawyers in the case formal notice of a hearing to work out whether the FBI would be allowed to clone and remove the seized items. The hearing was meant to be on April 2, by which time two courier drops of cloned information had already been sent.
An affidavit from the police officer in charge of the seized material, Detective Sergeant Nigel McMorran, detailed how two FBI agents worked in the electronic crime lab for two weeks.
He said he had contacted the agents to offer to take clones of the items to the United States Embassy only to find they had already sent the clones to the US.
Mr McMorran, who went on holiday for a month that same day, said he "did not make a report" of the conversation.
A judgment is expected this month.