RAAF serviceman's death was preventable, inquest finds

A South Australian inquest has concluded that the death of Royal Australian Air Force serviceman Gary Sargeant could have been prevented "on a number of occasions" while he experienced an acute mental health crisis, revealing critical gaps in military mental health protocols and duty of care procedures.

Gary Dale Sargeant, 36, a "valued and loyal" leading aircraftman who completed two Middle East deployments and received numerous service medals, drowned whilst in mental health distress at the Edinburgh air base in Adelaide's northern suburbs in late 2019.

Coroner identifies missed intervention opportunities

Deputy State Coroner Naomi Kereru handed down findings in South Australia's Coroner's Court on Thursday, identifying what she described as the "most obvious" failures in duty of care that preceded Mr Sargeant's death.

The coroner found that servicemen and women experiencing mental health crises deserve immediate, comprehensive support systems that prioritise their safety and wellbeing during their most vulnerable moments.

The inquest revealed that opportunities to prevent the tragedy were missed when Mr Sargeant was detained under the Mental Health Act. The coroner found that a thorough search should have been conducted at the time of his detention, and critically, he should not have been left unattended while awaiting ambulance transport.

These lapses in procedure represent significant departures from established mental health and duty of care standards that apply to vulnerable individuals in institutional settings.

Recommendations focus on facility infrastructure and protocols

The inquest's recommendations centre on substantial improvements to military health infrastructure and operational procedures across Defence facilities. A key finding calls for military health facilities to be equipped with secure treatment spaces designed to safely manage servicemembers experiencing acute mental health episodes.

Such facilities would provide appropriate containment and monitoring environments whilst preventing access to means of harm—a critical safeguard that was absent in Mr Sargeant's case.

• Implementation of secure treatment spaces at military medical facilities
• Mandatory search protocols for individuals detained under mental health legislation
• Continuous supervision requirements for servicemembers awaiting emergency transport
• Enhanced mental health training for military personnel involved in duty of care

National significance for Defence mental health policy

The findings carry broader implications for mental health management across Australia's Defence Force, highlighting systemic vulnerabilities in how military institutions respond to servicemembers in crisis. With high rates of mental health challenges among serving and ex-service personnel, the inquest underscores the necessity for Defence to strengthen its support infrastructure.

Mr Sargeant's case demonstrates that even highly decorated servicemembers with strong operational records remain vulnerable when mental health support systems fail to meet established duty of care standards.

Source

Original article: ABC News, 28 May 2026, "'Lost opportunity' to help air force serviceman before he died, inquest finds"