A man accused of murdering his wife and infant daughter has appeared in court as prosecutors continue presenting evidence in a major homicide case in Rockhampton, Queensland.

Matthew James Cox, aged 34, is facing allegations that he murdered his wife Tayla Black, 30, and their baby daughter Murphy Margaret, who was only 11 weeks old at the time of their deaths. The alleged killings occurred at their Rockhampton home in August 2023. Cox has not entered a plea to the murder allegations, and the matters remain before the court.

The current proceedings are part of a committal hearing, where the court examines the evidence collected by prosecutors before deciding whether the matter should proceed to a higher court for trial.

During the hearing, the prosecution has been calling witnesses to give evidence about events surrounding the deaths, Cox’s behaviour before the alleged incident and his movements around the time police became involved. A number of witnesses, including family members, colleagues, acquaintances and people connected through community groups, have provided evidence.

The court heard evidence about Cox’s activities in the days leading up to the alleged killings, including observations from people who interacted with him socially and professionally. Witnesses described different impressions of his behaviour, with some noting changes after he had previously sought mental health support.

Police became involved after Cox attended a police station in Brisbane and allegedly reported that his wife and daughter were dead at their Rockhampton property. Officers later attended the home and discovered the bodies of Tayla and Murphy.

The case has attracted significant public attention because of the deaths of a young mother and newborn child. However, Australian courts operate on the principle that an accused person is presumed innocent unless proven guilty beyond reasonable doubt.

During the hearing, defence barristers have questioned aspects of the evidence presented by the prosecution, including witness observations and interpretations of Cox’s behaviour. The defence has the opportunity to challenge evidence and raise issues relevant to the future trial process.

The prosecution is expected to continue presenting evidence before the court determines the next stage of the legal process.

The case remains ongoing, with further witnesses expected to appear during the committal hearing. The final outcome will depend on the evidence presented and decisions made through the Queensland court system.