An independent review will be published later into decisions made by Betsi Cadwaladr University Health Board, after a mental health patient released from one of its hospitals, went on to commit murder.
Deyan Deyanov, who had paranoid schizophrenia, attacked 60-year-old Jennifer Mills-Westley while she was shopping in the resort of Los Cristianos in the Canary Islands in 2011.
The 30-year-old had been admitted to the psychiatric unit at Glan Clwyd Hospital in Bodelwyddan in 2010, but was released in October that year.
He was sentenced to 20 years in a secure psychiatric unit, after being convicted of murder by a jury.
The independent report was commissioned by the Welsh Government after Ms Mills-Westley's two daughters pressed for an inquiry.
Over £170m of taxpayer money has been handed out in compensation because of medical negligence by Welsh Hospitals.
The figure for the last three years comes from research from the Welsh Liberal Democrats.
Rob Shelley has been to meet a father who's had to fight for compensation to cover the huge costs of 24 hour care.
The Welsh Government says that Betsi Cadwaladr University Health Board must to learn from these mistakes to prevent them from happening again.
It's following the revelation that more than £28m has been paid out to patients due to 'clinical negligence' since 2011.
On those relatively rare occasions when mistakes are made in the NHS and people are harmed as a result of poor care, individuals are able to seek redress. It is important the health service learns from these mistakes.
Over £28 million has been handed out by Betsi Cadwaladr University Health Board to patients and their relatives due to 'clinical negligence' since 2011.
It has also been revealed that since 2011-12, the NHS in Wales has paid out over £171 million. The health board says the number of claims made against the health service has recently increased.
The Health Board has seen an increase in the number of claims made against the health service which is in line with national trends.
We are working very hard to further reduce such rises in expenditure, by ensuring that lessons are promptly learnt from civil claims and clinical practices are changed and improved.
In relation to the level of monies paid out, this is dependent upon the type of claim settled.
Betsi Cadwaladr University Health Board is to be quizzed by the Public Accounts Committee after a report into into the health board's governance arrangements.
The Healthcare Inspectorate Wales and Wales Audit Office published the report on the corporate, clinical and financial challenges facing the health board. It follows a report published last year that identified failings in governance and management arrangements.
The Public Accounts Committee is concerned that Betsi Cadwaladr University Health Board still faces significant challenges with regards to the future shape of its clinical services and its precarious financial position.
While today's joint report shows that there has been some progress in addressing the failings highlighted last year, we maintain the belief that the senior management team still has a huge task ahead in restoring public confidence.
We will be asking representatives of Betsi Cadwaladr about these challenges and the progress in implementing our recommendations when they appear before the Committee.
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In accordance with the practices with our partners we have attended a meeting where concerns have been raised in relation to the quality and safety of patient care on Tawel Fan mental health ward in the Ablett Unit, at Ysbyty Glan Clwyd.
As such, at this stage we will be assisting Betsi Cadwaladr University Health Board Trust in the investigation which is currently in its infancy.”
Commenting on the north Wales health board's decision to close a mental health ward within the Ablett Unit in Ysbyty Glan Clwyd, Welsh Conservative Shadow Minister for Health Darren Millar AM said:
“This is more clear evidence of the need for an independent Keogh-style inquiry into standards of patient care within the Welsh NHS.
“This closure will be of deep concern to patients and their families and it’s hugely important that the health board quickly gets a grip on alternative arrangements for care.
“It is crucial that this does not infringe on the availability of beds for other patients over the Christmas period.
“Incidents like this clearly demonstrate the need for sufficient flexibility and availability of inpatient beds within mental health care right across Wales.”
Eight patients have been affected by the closure of a mental health ward at Ysbyty Glan Clwyd after concerns were raised about the quality of patient care.
Six patients have been moved to other mental health units in north Wales while two others have been transferred to another ward in the Ablett Unit at Glan Clwyd.
We are aware of the decision and actions taken by Betsi Cadwaladr University Health Board to close Tawel Fan. The quality and safety of care provided to patients is paramount and we are reassured that health board has acted quickly to ensure the concerns that have been raised are thoroughly investigated."
I would like to reassure patients and their families that we are taking this matter extremely seriously and that our priority is to ensure the safety and wellbeing of our vulnerable patients.
Immediate action has been taken in order to safeguard the patients and staff on Tawel Fan ward.
A small number of staff have been removed from patient care duties while we investigate.
Tawel Fan ward will reopen as soon as it is safe and appropriate to do so.”