Questions asked over why killer Daniel Rosenthal was allowed to walk free from hospital

Daniel Rosenthal was described by police as "potentially dangerous"

An investigation has begun into why a paranoid schizophrenic who was convicted of murdering his mother and suspected of killing his father was allowed to go on unsupervised walks whilst receiving treatment.

Daniel Rosenthal, 58, sparked a major hunt when he disappeared on Saturday from Tatchbury Mount Hospital at Totton, near Southampton.

Police warned members of the public not to approach the former science student who was found guilty in 1982 of killing his mother and then cutting up her body.

Rosenthal was discovered Sunday morning in Southampton.

Dr Julian Lewis, Tory MP for New Forest East, demanded to know why he was given the freedom to walk alone. “Whilst it is a relief that this man has been found, it is disturbing that someone regarded as a danger to the public – who should not be approached – was allowed to go for unsupervised walks,” he said.

A spokesman for Southern Health NHS Foundation Trust said Rosenthal would be returned to the hospital to continue his treatment.

He added: “We will be looking into all the circumstances around this incident and a full internal investigation has already begun.”

The body of Rosenthal’s American mother, Leah, 60, who suffered from multiple sclerosis, was never discovered.

Days before killing her he had travelled to Paris where it is believed he murdered his father Milton, a United Nations worker, after he refused to give him money.

However, he never stood trial in France or Britain for his father’s killing. He then returned to his home in Hampshire where he carried out experiments on chickens. It is here that he murdered his mother and chopped her up with a hacksaw. He denied the killings.

Rosenthal spent nearly three decades undergoing treatment at Ashworth high security hospital on Merseyside where patients include the moors murderer Ian Brady. It is one of three hospitals in the country for patients who require treatment in conditions of high security.

Start your day with The Independent, sign up for daily news emails
ebooks
ebooksA year of political gossip, levity and intrigue from the sharpest pen in Westminster
News
i100
News
One father who couldn't get One Direction tickets for his daughters phoned in a fake bomb threat and served eight months in a federal prison
people... (and one very unlucky giraffe)
Arts and Entertainment
Sink the Pink's 2013 New Year's Eve party
musicFour of Britain's top DJs give their verdict on how to party into 2015
Arts and Entertainment
(L-R) Amanda Peet as Tina Morris, Melanie Lynskey as Michelle Pierson, Abby Ryder Fortson as Sophie Pierson, Mark Duplass as Brett Pierson and Steve Zissis as Alex Pappas in Togetherness
TV First US networks like HBO shook up drama - now it's comedy's turn
Travel
Pool with a view: the mMarina Bay Sands in Singapore
travel From Haiti and Alaska to Namibia and Iceland
News
The will of Helen Beatrix Heelis, better known as Beatrix Potter, was among those to be archived
people
Arts and Entertainment
The Plaza Theatre in Atlanta, Georgia was one of the 300 US cinemas screening
filmTim Walker settles down to watch the controversial gross-out satire
News
Nigel Farage: 'I don't know anybody in politics as poor as we are'
i100
Latest stories from i100
Have you tried new the Independent Digital Edition apps?

Day In a Page

Aren’t you glad you didn’t say that? The worst wince-and-look-away quotes of the year

Aren’t you glad you didn’t say that?

The worst wince-and-look-away quotes of the year
Hollande's vanity project is on a high-speed track to the middle of nowhere

Vanity project on a high-speed track to nowhere

France’s TGV network has become mired in controversy
Sports Quiz of the Year

Sports Quiz of the Year

So, how closely were you paying attention during 2014?
Alexander Armstrong on insulting Mary Berry, his love of 'Bargain Hunt', and life as a llama farmer

Alexander Armstrong on insulting Mary Berry and his love of 'Bargain Hunt'

From Armstrong and Miller to Pointless
Sanchez helps Gunners hold on after Giroud's moment of madness

Sanchez helps Gunners hold on

Olivier Giroud's moment of madness nearly costs them
A Christmas without hope: Fears grow in Gaza that the conflict with Israel will soon reignite

Christmas without hope

Gaza fears grow that conflict with Israel will soon reignite
After 150 years, you can finally visit the grisliest museum in the country

The 'Black Museum'

After 150 years, you can finally visit Britain's grisliest museum
No ho-ho-hos with Nick Frost's badass Santa

No ho-ho-hos with Nick Frost's badass Santa

Doctor Who Christmas Special TV review
Chilly Christmas: Swimmers take festive dip for charity

Chilly Christmas

Swimmers dive into freezing British waters for charity
Veterans' hostel 'overwhelmed by kindness' for festive dinner

Homeless Veterans appeal

In 2010, Sgt Gary Jamieson stepped on an IED in Afghanistan and lost his legs and an arm. He reveals what, and who, helped him to make a remarkable recovery
Isis in Iraq: Yazidi girls killing themselves to escape rape and imprisonment by militants

'Jilan killed herself in the bathroom. She cut her wrists and hanged herself'

Yazidi girls killing themselves to escape rape and imprisonment
Ed Balls interview: 'If I think about the deficit when I'm playing the piano, it all goes wrong'

Ed Balls interview

'If I think about the deficit when I'm playing the piano, it all goes wrong'
He's behind you, dude!

US stars in UK panto

From David Hasselhoff to Jerry Hall
Grace Dent's Christmas Quiz: What are you – a festive curmudgeon or top of the tree?

Grace Dent's Christmas Quiz

What are you – a festive curmudgeon or top of the tree?
Nasa planning to build cloud cities in airships above Venus

Nasa planning to build cloud cities in airships above Venus

Planet’s surface is inhospitable to humans but 30 miles above it is almost perfect