A man who is accused along with three others of murdering a Perth father of two says he expects up to 140 witnesses will be called in the trial commencing later this year.
David Blenkinsopp went missing from Wanneroo in the early hours of March 4, 2012, and his body was found buried in bushland in nearby Pinjar later that month.
Gary David Young, who was 53 when he was arrested in the Goldfields region and charged with Mr Blenkinsopp's murder shortly after the body was discovered, told the State's Supreme Court on Monday he believed another man was yet to be charged in addition to his three co-accused.
Tamara Kathleen Broadbent from Wanneroo, Kym Steven Foster of Ridgewood and Eden Hill man Damien Paul Kosick were aged 42, 45 and 37, respectively, at the time of their arrests for allegedly murdering Mr Blenkinsopp.
All appeared via videolink from various prisons today, but Mr Young was the only one to address the court.
Mr Young said he estimated between 120 and 140 witnesses could take the stand, pushing the trial out well beyond the six weeks estimated by the court.
So far, the court expects 76 witnesses will give evidence, 30 of those being forensic officers.
A provisional trial date of July 22 has been set down, while a status conference will be held on March 7.
The four remain remanded in custody.