Don Lock death: Ten killings to be reviewed by NHS trust Published duration 17 May 2016

media caption Matthew Daley said he went into "auto-pilot" during the attack

Ten killings involving patients of a mental health trust will be reviewed after the conviction of a man who stabbed a motorist to death.

Matthew Daley, 35, stabbed Donald Lock 39 times on the A24 in Findon, after the 79-year-old ran into the back of his vehicle.

He was convicted of manslaughter on the grounds of diminished responsibility.

The court heard his family had pleaded with the NHS to section him prior to the murder.

Sussex Partnership NHS Foundation Trust has apologised for its role and said it had commissioned a "thematic review" of 10 killings between 2011 and 2016 involving patients - including Daley - it had come into contact with.

image caption Retired solicitor Donald Lock was stabbed 39 times

The trust's chief executive Colm Donaghy said: "We decided there was a need to look to see whether lessons or common themes from the homicide emerged.

"The review of 10 cases is not to reopen those cases - it's to look at the themes."

During the trial, jurors were told Daley's mother pleaded with mental health experts to have her son sectioned.

She told the court the day she heard Mr Lock was killed was "the day that all your nightmares came true".

Ten cases to be reviewed

Kayden Smith killed Danish tourist Jan Jansen at his flat in Hassocks in 2012

Graeme Morris travelled from Brighton to Troon and killed his mother in 2012

Christopher Jeffrey-Shaw was convicted of manslaughter after Janet Muller was burned to death in the boot of car near Horsham in 2015

David Sole was jailed for life for the "motiveless and brutal" murder of a Jonathan Ellison in his Brighton flat in 2011

Sean Iran was jailed for life for killing a friend then burning his body on a Brighton golf course in 2010

Steven Dunne killed Gordon Stalker in Brighton claiming he was a witch who had captured his soul 2010

Roger Goswell killed his wife Susan in West Chiltington in 2007 after she told him she was not a virgin before they married

Shane Noble punched and kicked Chris Poole to death outside a convenience store in Eastbourne in 2012

Oliver Parsons murdered Joe Lewis on Christmas Day morning at a flat in Brighton in 2014

Matthew Daley killed motorist Donald Lock by stabbing him 39 times on the A24 in Findon, West Sussex, in 2015

Mr Donaghy admitted the trust should have listened to those family pleas for help and said it had failed Daley.

"We should have carried out a formal assessment of a formal diagnosis for Matthew," he said.

"We had a diagnosis of Asperger's and what we should have done is had a formal diagnosis because he was also suffering from symptoms of psychosis.

"We should have also considered different ways potentially of treating Matthew. And finally we should have listened to the family more closely and taken action on some of the things they indicated."

"We failed in the care that we gave Matthew."

image caption Colm Donaghy admitted the NHS trust had failed

image caption Donald Lock had four grandchildren and five great-grandchildren

The mother of a former trust patient, who stabbed a woman to death seven years years ago, said the organisation should be "investigated and monitored long term".

The mental health trust apologised after an investigation found there were signs about the risks posed by Samuel Reid-Wentworth before he killed his victim in Littlehampton.

Angela Reid-Wentworth told BBC Sussex in an email: "When an organisation persistently and repeatedly fails then it comes from the top.

"There needs to be urgent legislation which makes health authorities and their professionals do their work properly and to be much more accountable."