Vic killer's friends investigated: inquest

Double murderer Steven James Hunter was not alone when he went to a Melbourne hardware store and bought supplies to dispose of Sarah Cafferkey's body, an inquest has heard.

He took another man, who later approached police and made a statement of "significant assistance".

The man said Hunter came to his home in November 2012 and the pair went for a drive.

Hunter then revealed he had a body to dispose of and blamed someone else for the killing, Detective Senior Sergeant Stephen McIntyre said on Thursday.

The man was with Hunter when he bought cement, acid and lime, but he refused to help hide Ms Cafferkey's body at sea or on a farm.

Hunter fatally stabbed and bashed 22-year-old Ms Cafferkey at his Bacchus Marsh home on November 10, 2012.

He then drove her body to a home in Point Cook, placed it in a wheelie bin and poured concrete on it.

Hunter later confessed, saying he acted alone.

He is the only person charged over Ms Cafferkey's murder, but police also investigated several of his associates.

Gloves containing DNA linked to some of Hunter's friends were found at the Point Cook address, but nothing connected them to her death.

A sponge with human blood on it that did not return a DNA result was found at the home of another of Hunter's friends.

Shoes belonging to another man, which had concrete on them, were seized.

Another wrote down his movements on the day Ms Cafferkey was murdered, the inquest into her death heard.

He probably suspected Hunter had killed Ms Cafferkey, Det Sen Sgt McIntyre said.

"He was trying to identify what his alibi was for not being involved," he told the Victorian Coroners Court.

"Just because he is making notes ... it could as much be he is not involved in it."

Hunter contacted some friends in the days around Ms Cafferkey's murder, and phone records were inconsistent with what a couple of them told police.

But there wasn't enough evidence to charge anyone else over Ms Cafferkey's death or the disposal of her body, Det Sen Sgt McIntyre said.

No further investigation is being conducted.

CCTV footage indicates Hunter was alone when he carried Ms Cafferkey's body from his car, a notion consistent with the fact her body was not moved again from the Point Cook address.

Hunter, who killed Ms Cafferkey 11 days after completing parole on other offences, was jailed for life.

He was convicted of another murder in 1988.

An inquest into Ms Cafferkey's death, before state coroner Ian Gray, will resume in October.