Dr Manjeet Shehmar, medical director at NUH, said: “The families of Ian, Grace and Barnaby have had to endure much pain and heartache, and I am truly sorry that the actions of some of our staff have added to that.
“To access the medical records of our patients without a legitimate reason is totally unacceptable and we are doing all we can to identify where and how that has happened.”
Shehmar is expected to give her evidence to the Nottingham Inquiry next week.
The trust said follow-up activity would take place with independent regulators, such as the Nursing and Midwifery Council and General Medical Council.
Shehmar said appropriate access was a “fundamental principle of our duty of care” which the “vast majority” of staff understood.
She added: “By accessing records inappropriately, staff are damaging the valuable contributions made by those colleagues providing care for those patients.
“In those cases where it does happen, I hope that this is a very clear reminder that we will take appropriate action.”
Calocane was sentenced to a hospital order in January 2024 after admitting three counts of manslaughter on the grounds of diminished responsibility and three counts of attempted murder.
What later emerged was a series of failings by authorities, including the police and mental health services – which Calocane was known to – prompting calls for a statutory public inquiry.
NUH is among a number of organisations in which staff inappropriately viewed records or information related to the fatal attacks.
