Court keeps slush fund evidence secret VICTORIAN detectives fear critical witnesses who are yet to be interviewed in the AWU "slush fund" investigation might change their stories if evidence already gathered by police is publicly revealed. Chief Magistrate Peter Lauritsen yesterday refused to release the affidavits and statements behind his ruling that there are reasonable grounds to believe former Australian Workers Union official Bruce Wilson created documents in the furtherance of a fraud - documents that were held by law firm Slater & Gordon until they were seized under a police warrant two decades later.