Mental Health in Custody: Tammy Shipley’s Inquest

Published: 23 February 2026. The English Chronicle Desk. The English Chronicle Online.

Tammy Shipley drank an extraordinary amount of water in custody before her death, a coronial inquest revealed. The 47-year-old mother of five, held at Silverwater Women’s Correctional Centre in New South Wales, consumed at least 67 cups of water in twelve hours prior to her death on 20 December 2022. Shipley had been arrested on minor shoplifting charges, but her death has prompted serious questions about the treatment of mentally unwell detainees. CCTV footage presented at the inquest shows her drinking excessively, highlighting systemic gaps in monitoring vulnerable prisoners and mental health protocols within custodial facilities.

Shipley’s arrest and subsequent detention occurred amid a history of significant mental health issues, including schizophrenia and bipolar disorder, alongside substance abuse and prior suicide attempts. Peggy Dwyer SC, counsel assisting the coroner, outlined these details in her opening address during the resumed inquest, emphasizing how Shipley’s mental health conditions were neither effectively communicated to police nor to the correctional officers tasked with her care. The inquest also examined whether existing police and custodial management systems adequately flag individuals with complex mental health histories, suggesting potential reforms similar to family violence warning systems.

The inquest had previously been adjourned after the New South Wales Police Commissioner challenged the coroner’s authority to examine the circumstances surrounding Shipley’s arrest. Ultimately, the Supreme Court of New South Wales confirmed that the coroner could consider all aspects of her detention and the events leading to her death. The resumed proceedings under State Coroner Teresa O’Sullivan have focused on whether institutional procedures sufficiently protect individuals experiencing mental distress during custody.

Shipley’s behaviour before and during her detention raised significant concerns. Despite a documented history of mental health issues, she reportedly denied experiencing any psychiatric conditions when interacting with police. During her arrest, she disclosed hearing persistent voices in her head, yet these warnings appear to have gone unheeded. The inquest revealed that Shipley had previously been sectioned under the Mental Health Act due to delusions regarding her neighbours, highlighting a pattern of serious psychiatric vulnerability.

CCTV footage shown at the inquest depicts Shipley consuming water excessively over consecutive days, culminating on the day of her death. Dwyer explained that the red cup seen on the recordings held approximately 300ml of water, and Shipley drank from it at least 67 times between 12:33am and 11:51am. This equates to roughly 20 litres consumed in a single day, a dangerously high volume that overwhelmed her body’s sodium balance. Polydipsia, an uncontrollable thirst often associated with psychiatric disorders, likely contributed to this extreme behaviour.

The footage further illustrates that Shipley collapsed on her bed at 11:55am, exhibiting vomiting and defecation alongside visible spasms. Guards reportedly passed her cell at 12:27pm and 12:41pm without noticing her distress. Obstructed sightlines due to blinds limited their ability to identify the severity of her condition, delaying medical intervention. Only when an officer opened the hatch and attempted to engage her did the alarm sound. A prison psychiatrist was present on a scheduled visit, followed by two nurses who found her non-responsive at 1:35pm. Despite immediate attempts to revive her and perform CPR, she tragically could not be saved.

Autopsy findings confirmed that Shipley died from hyponatraemia, a condition caused by dangerously low sodium levels, exacerbated by her excessive water consumption and underlying schizoaffective disorder. The inquest has highlighted how unaddressed mental health issues, combined with inadequate monitoring and communication systems in custody, contributed to her death. Experts at the hearing argued that warning mechanisms for mentally unwell detainees could be strengthened to prevent similar tragedies, ensuring critical health information is available to both police and correctional staff.

Shipley’s death underscores systemic shortcomings in how custodial services manage detainees with mental health complexities. Although the prison had protocols for regular checks, obstructed views and reliance on passive monitoring delayed lifesaving interventions. The inquest questioned whether more robust measures, such as enhanced surveillance or mandatory reporting of mental health histories, might have changed the outcome. Advocates for custodial reform have stressed that awareness and responsiveness to mental health signs are essential to safeguard vulnerable individuals in detention.

This case also raises broader societal questions about how minor offences are handled when individuals struggle with serious mental health challenges. Experts emphasized that the intersection of mental illness and the criminal justice system requires more than standard custodial procedures, highlighting the need for integrated mental health care within law enforcement and correctional facilities. The coroner’s inquiry is now examining whether current laws and protocols adequately protect people like Shipley and whether systemic reform is necessary to prevent recurrence.

Family members and advocates have expressed frustration over what they see as preventable circumstances leading to her death. Shipley’s relatives noted that she had long struggled with untreated psychiatric conditions, and that her behaviour during detention reflected the urgency of her mental health needs. The inquest also examined prior missed opportunities to intervene, particularly the lack of communication between police and custodial services regarding her medical and psychological background.

During the hearing, it became clear that Shipley’s case exemplifies a broader issue in managing mental health in correctional facilities. While many detainees experience stress and anxiety, individuals with severe psychiatric disorders require specific attention, including monitoring for behaviours such as compulsive water drinking. The inquest may recommend systematic changes, such as alerts within police databases and mandatory reporting to custodial staff, to ensure that vulnerable detainees are identified and cared for appropriately.

The tragic death of Tammy Shipley continues to resonate within the New South Wales justice system, highlighting urgent questions around mental health care in custody. The coroner’s inquiry serves as a critical examination of both procedural failings and broader systemic issues, urging authorities to reconsider how detainees with complex needs are supported. Shipley’s excessive water consumption, linked to both psychiatric disorder and delayed intervention, serves as a stark reminder of the consequences of inadequate monitoring and communication across agencies.

As the inquest proceeds, it will likely explore specific recommendations aimed at preventing similar deaths, including revised monitoring protocols, mental health alerts in custody management systems, and staff training to recognise and respond to signs of severe psychological distress. The outcome may shape future custodial practices, ensuring that detainees like Shipley receive timely support and intervention, ultimately safeguarding their health and lives.

The focus on mental health in custody remains a pressing concern for policymakers, law enforcement, and correctional authorities. Shipley’s death illustrates the complex interplay between psychiatric conditions, systemic shortcomings, and human oversight, and underscores the need for rigorous protocols to protect vulnerable detainees. Public awareness and media coverage of this case continue to emphasize accountability and the importance of mental health integration within custodial care systems.

By examining every detail of Tammy Shipley’s final hours, the inquest sheds light on systemic vulnerabilities in the criminal justice system. Her death is not just an isolated tragedy, but a cautionary tale highlighting the critical need for reform, proactive communication between agencies, and comprehensive mental health support for detainees. The lessons from her case may inform policy and practice, shaping a safer and more responsive environment for all individuals in custody.

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