An inquest into a Queensland teenager's murder more than 30 years ago will continue in Brisbane with a notorious jailhouse killer expected to take the stand.
Annette Mason was 15 when she was bludgeoned to death in a house she shared with friends in Toowoomba in November 1989.
No one has been charged with her murder.
The inquest will continue in the Coroners Court in Brisbane on Wednesday, examining when, where and how she died.
Coroner Terry Ryan will also try to determine if anyone should be charged with Annette's murder or manslaughter.
Convicted killer Allan McQueen has been named as a "person of interest" in Annette's death.
The armed robber, who bludgeoned a prison inmate to death with gym weights in the 1990s, was called to give evidence at the inquest on March 25.
However, while he was seated in the dock his legal counsel asked for an adjournment, claiming they had not had enough time to discuss the extensive evidence.
An adjournment was granted until Wednesday in the interest of fairness, devastating the Mason family who have been waiting decades for answers.
They have attended the inquest each day since it reopened last month wearing yellow - Annette's favourite colour.
The first inquest in 1991 was closed and subject to "reopening at any stage should further evidence become available".
It was reopened in 2018, but adjourned weeks later and further delayed by COVID-19 and DNA tests in New Zealand.
Reopened again last month, the inquest is now being conducted under changes to state legislation that gives coroners more powers to compel witnesses to give potentially self-incriminating evidence.
Linda Mason believes someone knows what had happened to her sister.
"People know but either they are too scared or they don't want to come forward," she said last month.
"Those who may not have said something in the past may be compelled to say something now - we will wait and see."
