A GWENT man - who killed his father with a samurai sword as a teenager - died while on leave from hospital, an inquest has heard.

Kane Evan John Morgan was detained under the mental health act when he was 18-years-old after stabbing his father, Michael, in 2008, a jury at Gwent Coroner’s Court was told on Tuesday.

After spending time in different hospitals, Mr Morgan was transferred to Maindiff Court Hospital in Abergavenny in 2012, the court, sitting in Newport, heard.

At this point, he was allowed home visits and unsupervised time away from the hospital of up to 10 hours a day.

Alicia Holmes, a mental health nurse at the hospital in Abergavenny, said Mr Morgan’s ward was 'low secure'. On October 30, 2015, a drug sweep was taken of the ward after concerns were raised of patients using subutex, a heroin substitute.

All patients were drug tested and Mr Morgan was allowed to leave the ward.

But police were called later that day to Hengoed Viaduct where Mr Morgan was pronounced dead at the scene, the inquest heard.

The results of the drug test later revealed the 25-year-old had tested positive for subutex.

Speaking about Mr Morgan's mental health, his mother, Hayley, said her son went to the GP after he said he could hear voices but was not diagnosed with paranoid schizophrenia until after her husband’s death.

On the day he killed his father, the jury heard, Mr Morgan was found by police near the viaduct in Hengoed. He was initially charged with the murder of his father but his charge was later reduced to manslaughter, on the grounds of diminished responsibility.

Ms Holmes told the inquest staff had ‘no concerns’ about Mr Morgan, of Caerphilly, and there was ‘no reason’ to cancel his leave.

A post-mortem examination concluded the cause of death to be a laceration to the aorta, lung and liver, the fracture of ribs and sternum, and blunt trauma from fall.

Schizophrenia diagnosis, drugs and alcohol intake were said to have been contributing factors.

A toxicology report showed Mr Morgan also had prescribed anti-depressants in his system.

The jury concluded Mr Morgan’s death was suicide.