A statement by crime boss Carl Williams has been released, in which he claims a former Victorian detective offered to kill rival Jason Moran for $400,000.
The statement by Williams, who was murdered in prison in 2010, was publicly released on Friday as part of the royal commission into the management of police informants.
The claims, which have previously been aired publicly, include that Williams met former detective Paul Dale a dozen times and that he would regularly pay the officer thousands in cash for tip-offs.
"He was telling me that he could keep an eye out for me. In return Dale expected to be paid for any information that he gave to me," Williams says.
"He would keep me updated as to what was going on with drug squad investigations that involved me or where my name was mentioned."
Another time, he says Dale asked if he wanted them to "do anything" about his rival Jason Moran.
"Dale said they could kill Jason for $400,000. I told them they were dreaming," Williams said, adding former detective, David Miechel, was part of the conversation.
On another occasion, Williams says he paid Dale $10,000 to remove photos and videos from the brief of evidence against his associate, Ian Lesser. He says Lesser later told him they were not part of the case against him.
Dale recently testified at the commission into police use of informant Nicola Gobbo, known as Lawyer X.