Northumbria Police have launched a corporate manslaughter investigation into Nottinghamshire Healthcare NHS Foundation Trust (NHFT) over the care and treatment of Valdo Calocane, who killed three people in Nottingham on June 13, 2023. Calocane, diagnosed with paranoid schizophrenia, fatally stabbed students Barnaby Webber and Grace O’Malley-Kumar, both 19, alongside 65-year-old caretaker Ian Coates. Following these attacks, he also seriously injured three pedestrians by driving a van he had stolen from Coates.

Calocane was under the care of NHFT from 2020 until his discharge in 2022. During this period, he was sectioned four times and underwent treatment from the trust’s Early Intervention in Psychosis (EIP) service. Despite concerns over his violent behaviour and a warning from a doctor that he could "end up killing someone," Calocane was discharged after failing to attend appointments and becoming unreachable by healthcare workers. At the time of the attacks, there was also an outstanding arrest warrant for him related to an alleged assault on a police officer, an issue highlighted during a public inquiry earlier this year.

The inquiry, which concluded in June, examined NHFT's handling of Calocane’s case. It found that Calocane’s discharge came amid repeated failures to engage with treatment services. Nottinghamshire and Leicestershire police forces have apologized for not acting on the outstanding warrant, which reportedly influenced Northumbria Police’s decision to conduct the manslaughter investigation on behalf of Nottinghamshire Police. The trust had already been under scrutiny following a 2026 Care Quality Commission report that called for significant improvements.

Emma Webber, mother of victim Barnaby Webber, described the investigation as "the beginning of the reckoning" and an unprecedented move that she hopes will bring accountability at an organisational level across public services. She emphasised the need for those responsible for failings, neglect, or cover-ups to be held fully accountable.

NHFT has stated it is cooperating fully with Northumbria Police over the investigation. Corporate manslaughter charges, which apply to certain public bodies including NHS trusts, could lead to substantial fines and changes to the trust’s leadership, depending on the outcome. The inquiry chairwoman, Deborah Taylor, is expected to publish a report with findings and recommendations next year. Authorities and families continue to seek answers about the series of decisions and actions surrounding Calocane’s care prior to the attacks.