Jonathan MacMillan, 28, (pictured) killed his father at home in Barrow-in-Furness, Cumbria in June 2019
A mother has criticised NHS mental health services after her schizophrenic son killed his father days after being mistakenly released from hospital.
Glenys Hird spoke out after a judge called for a 'full inquiry' into the 'serious failing' which left Jonathan MacMillan free to attack his father John.
MacMillan, 28, admitted manslaughter on the grounds of diminished responsibility in a court appearance last month.
It has since emerged he had been treated at the Cygnet private hospital in Maidstone, Kent – 350 miles from his home in Barrow-in-Furness, Cumbria.
He had been placed there shortly before the attack in June as it was the nearest mental health bed available.
Mrs Hird, 53, said the hospital let out MacMillan a month early after an administrative blunder and refused to listen to the concerns of his mental health worker or his terrified parents back in Barrow.
Four days after arriving home, he attacked Mr MacMillan, 70, who he allegedly believed had been possessed by Satan, by slashing his throat.
The taxi driver, who was divorced from Mrs Hird, was found by her with serious chest and neck injuries before being pronounced dead at the scene.
Glenys Hird (alongside Jonathan as a child) has since spoken out after a judge called for a 'full inquiry' into the 'serious failing' which left Jonathan free to attack his father
Yesterday she was in tears as she told how her ex-husband had died needlessly and her only son had been 'badly let down' by mental health services.
Mrs Hird, a health and safety adviser, said: 'I am angry. Absolutely. What's happened is horrendous, it beggars belief. There was a catalogue of missed chances, opportunities were missed at every step.
'All of this could have all been avoided if Jonathan's care had been handled differently and we had been listened to.
'I've lost my son and John is dead. Although we had been divorced for more than 20 years, we saw each other regularly.
'He was a good friend and we collaborated a great deal in trying to deal with Jonathan's problems. Jonathan loved his dad and his dad worshipped him.'
Mrs Hird said her son was a 'bright and intelligent' boy who excelled at athletics and did well at school.
John MacMillan, 70, (pictured) was found with serious chest and neck injuries before being pronounced dead at the scene
But after going to sixth form college, he started going off the rails. His parents initially put his problems down to being a teenager, smoking cannabis and hanging around with the wrong crowd.
The problems persisted and by his mid-20s, Mrs Hird realised her son, who by then had started hearing voices, having delusions, talking in different accents and suffering paranoia, was seriously ill.
But each time she persuaded him to go to the doctor or see a mental health professional, MacMillan convinced them he was fine. She added: 'He was bright and articulate and for years he kept his illness hidden well.
'Apparently, half of all schizophrenics have no realisation they are ill. Jonathan had no insight into his illness and it was difficult for us to get care for him. But his behaviour could be very frightening. I was worried he would kill himself or someone else.'
From October 2017 to March 2018, MacMillan spent six months in jail for assault and possession of a