The body of the 52-year-old property investor was found in a junk-strewn suburban backyard in north-west Melbourne on Friday, eight days after he was reported missing on January 21.

It has been claimed Mr Rockefeller was using erotic websites to find partners in Melbourne's swingers network.

Police allege Mario Schembri, 57, of Wallan, and Bernadette Denny, 41, of Hadfield, murdered MrRockefeller at Denny's home.

When the pair appeared in the Melbourne Magistrates Court for a short filing hearing yesterday, a security guard stood between them.

Schembri, who was wearing a white T-shirt, appeared to be trying to get Denny's attention during the hearing.

Denny, wearing an orange zip-up top, sat looking towards the front of the court throughout the five-minute hearing.

At one point, Schembri appeared to hide from a court sketch artist.

Schembri's son was in court, which also heard that Denny required medication for arthritis.

No evidence was heard during the hearing and the pair were not required to enter pleas. They were remanded until May 24 for a committal mention hearing.

Chief Magistrate Ian Gray suppressed Schembri's street address after an application by his lawyer. Mr Gray said there was no point in suppressing Denny's address as it was already widely known.

An out-of-sessions hearing held on Friday was told Mr Rockefeller was killed within hours of returning to Melbourne from an interstate business trip.

He was last seen on closed circuit camera footage at Melbourne Airport after 9pm on January 21.

His 2007 Toyota Prius was found abandoned in rural Victoria four days later.

AAP