A man accused of murdering his wife and her best friend in Queensland more than 20 years ago will find out within six months whether he will stand trial.

Alan Leahy was released on bail by a Cairns Supreme Court judge on Wednesday after handing himself into police last week.

Earlier this month, State Coroner Michael Barnes committed Leahy to stand trial over the deaths of his wife Julie-Anne Leahy and her friend Vicki Arnold.

However, it will be up to Director of Public Prosecutions Tony Moynihan to decide whether Leahy actually stands trial.

Mr Moynihan has until September 1 to decide whether there are reasonable prospects of a conviction.

As part of his bail conditions, Leahy can't contact Julie-Anne Leahy's younger sister, who could be a key witness if the case goes to trial, and must report to police weekly.

He can't apply for a passport and must live at his home in Perth, although he's allowed to travel between states for work purposes.

Leahy has denied any involvement in the deaths.

In a written statement, Leahy said Mr Barnes made a number of errors and his findings would be the subject of a judicial review.

Two previous inquests concluded the women had died in a murder-suicide pact.

The pair were found dead in a four-wheel drive in remote bush on the Atherton Tablelands, near Cairns, in August 1991.

Ms Arnold was initially found to have been the likely killer, despite the fact she was shot three times with a Ruger .22 rifle, including once in the back of the head.