A Melbourne court has heard secret recordings of convicted killer Bandali Debs discussing the fatal shooting of two police officers and suggesting the killing of two more.
Sergeant Gary Silk and Senior Constable Rodney Miller were staking out a possible armed robbery target, the Silky Emperor Chinese restaurant in Moorabbin on August 16, 1998, when they pulled over a car and were shot.
Accused killer Jason Roberts, 41, has claimed he was not in the suburb at the time.
But Debs, his former armed robbery associate, has given evidence from Goulburn Prison that he was with Roberts and they were armed with handguns when the officers pulled them over on Cochranes Road.
In covert recordings played to the jury from bugs hidden in Debs' house and car in 1999, Debs could be heard describing events to his father Malik.
"They seen us ... they drove behind us and drove down the street to stop us ... they stopped, then it's not good," Debs could be heard saying.
A secretly recorded conversation with Debs' daughter Joanne revealed that as investigators closed in he wanted to kill two more officers within the next six months to put police off his trail.
"If it continues like this ... two CPs (police officers) have got to go down so the investigation goes stupid," he told her.
He said he would take back roads to the other side of the city, where he would "get rid of" two cops.
He also asked Joanne whether he should "get rid of the kid" to make detectives think the crimes were drug related.
At the time Roberts was aged 17 and the boyfriend of Debs' other daughter Nicole.
Debs testified that Roberts wanted to be informed of anything regarding the Taskforce Lorimer investigation into the Silk and Miller murders, and was recorded telling Joanne that Roberts had rung him.
"I think it's about the matter where two CPs have gone down, he wouldn't ring me under any other circumstances," Debs told her.
Earlier on Wednesday, Debs testified that Detective Dean Thomas spoke to him at a supermarket and he believed Det Thomas was following him.
The policeman approached Debs with a police statement to sign, but he refused.
Roberts has pleaded not guilty to the Silk and Miller murders, but has admitted 10 armed robbery offences.
Prosecutors allege Roberts fired one of the fatal shots that struck Sgt Silk, and it's alleged he either aided and abetted or was in a joint criminal enterprise with Debs to murder Sen Const Miller.
The Supreme Court trial before Justice Stephen Kaye continues on Thursday.
