The suspended head of Vanuatu's transnational crime unit, Andrew Kalman, says he wants to find out who is behind his suspension last Friday.
Mr Kalman was part of the team investigating the yacht, the Phocea, which was searched ten days ago on suspicion it carried guns.
He says drugs were found which he says had been brought from the Port Vila area to the boat.
Mr Kalman says he believes the government's move to suspend him is linked to the Phocea probe, which is also investigating the alleged presence on the boat of two government ministers.
He says greed and special interests are behind his suspension, which he says has disappointed his immediate superior.
"I'm willing to find out who was the official complainant for my suspension, and I'm willing to take it further in relation to criminal defamation."
Police have declined all comment and the opposition suspects there is a major cover-up.