The Western Health and Social Care Trust confirmed that the handling of Katie Simpson's case qualifies as a Serious Adverse Incident. This decision came almost six years after her admission to Altnagelvin Hospital on August 3, 2020.

Katie Simpson arrived unresponsive at the hospital. Jonathan Creswell, partner of her sister, stated he had saved her from a suicide attempt. Police later determined she had been raped and murdered by Creswell.

PSNI launched a murder investigation months later, resulting in Creswell's arrest. His trial began in April 2024 but ended after one day when he was found dead at his bail address from suicide.

The Trust's Rapid Review Group met on the morning of May 7 and agreed the case met the SAI threshold. A spokesperson said the matter will be formally notified to the Department of Health, with the notification date recorded per regional guidance.

In February 2025, Justice Minister Naomi Long announced an Independent Review by Dr Jan Melia into public authorities that interacted with Katie Simpson and Jonathan Creswell. The Trust's spokesperson stated it remains committed to examining and implementing learning from the review.

The Trust responded to questions about staff concerns during Simpson's hospital stay. It said clinical staff, supported by managers, provided statements to PSNI and acted appropriately. Staff follow policies on suspecting crime, the Trust added.

On visitor protocols, the Trust noted families decided who could visit. Each visitor completed a checklist, with records kept in ICU.