Paranoid schizophrenic Karl Addo admits decapitating flatmate Sergio Retamar Marquez with meat cleaver in frenzied violent attack

Neighbour heard sound of laughter as brutal attack on Sergio Marquez was taking place

A severely mentally ill man in the grip of a paranoid episode beheaded his flatmate in a frenzied attack with a meat cleaver, a court has heard.

Karl Addo, 30, denied murder but pleaded guilty to the manslaughter of Spanish student Sergio Retamar Marquez, 23, in Bournemouth last year.

Mr Addo, who had been suffering from paranoid delusions that he was being persecuted by gangs and injected with drugs, killed Mr Marquez in what was described by prosecutors as a "prolonged, horrific and very violent attack" which left the Spaniard "terribly mutilated".

The court head that Mr Addo had snapped on the day he had been told to leave the flat he shared with Mr Marquez.

Flatmates told police that Addo had been acting strangely in the run-up to the events of July 2012. They said Addo had stolen food from them and had used book pages as toilet paper. He had not paid his rent and had been told to leave by the landlord, the court heard.

The court heard that Mr Addo had absconded from the Huntley Mental Health Centre in London, where he was voluntarily receiving treatment, the day before a panel of professionals decided he should be sectioned.

He had then "disappeared" from mental health services before moving to Bournemouth in May. He killed Mr Marquez, a hotel waiter, on July 17 last year - nine months later.

Mr Addo had been involved in an incident which saw him being ejected from a terminal at Heathrow Airport. He was also questioned by police at Marylebone station in London where he had been sleeping rough, prosecutor Nigel Pascoe QC, said.

The headless and disembowelled body of Mr Marquez was discovered by flatmates who ran screaming from the house where they were supposed to be celebrating the birthday of one of their number.

Police officers arrested Addo nearby covered in blood, the court was told. He had fled the flat when the others had returned.

Mr Marquez had tried to defend himself from the attack but was cornered in a room. A neighbour heard some of the attack and Mr Marquez saying "please Karl, please Karl", furniture being dragged around and then Addo laugh, Mr Pascoe said.

He was decapitated and disembowelled after he died, the court was told.

Mr Addo, of no fixed abode, pleaded not guilty to murder but guilty to manslaughter through diminished responsibility. He is currently being treated at Broadmoor, the court was told.

The family of Mr Marquez wept in court as they heard the details of their loved one's death.

In statement after the hearing, his mother Maria Carmen Marquez Torres, said: "Sergio's life was cut short, a boy that only wanted to work, learn, help others, enjoy the life that God gave him and make everybody that knew him happy.

"He had such a beautiful life. He wanted to be a father and have three children, and the thought of this filled him with excitement.

"Sergio had everything, he was handsome, happy, kind, healthy, responsible, fun, and polite. He is a person that is impossible to replace."

Additional reporting by the Press Association

Start your day with The Independent, sign up for daily news emails
Latest stories from i100
Have you tried new the Independent Digital Edition apps?

Day In a Page

Jeb Bush vs Hillary Clinton: The power dynamics of the two first families

Jeb Bush vs Hillary Clinton

Karen Tumulty explores the power dynamics of the two first families
Stockholm is rivalling Silicon Valley with a hotbed of technology start-ups

Stockholm is rivalling Silicon Valley

The Swedish capital is home to two of the most popular video games in the world, as well as thousands of technology start-ups worth hundreds of millions of pounds – and it's all happened since 2009
Did Japanese workers really get their symbols mixed up and display Santa on a crucifix?

Crucified Santa: Urban myth refuses to die

The story goes that Japanese store workers created a life-size effigy of a smiling "Father Kurisumasu" attached to a facsimile of Our Lord's final instrument of torture
Jennifer Saunders and Kate Moss join David Walliams on set for TV adaptation of The Boy in the Dress

The Boy in the Dress: On set with the stars

Walliams' story about a boy who goes to school in a dress will be shown this Christmas
La Famille Bélier is being touted as this year's Amelie - so why are many in the deaf community outraged by it?

Deaf community outraged by La Famille Bélier

The new film tells the story of a deaf-mute farming family and is being touted as this year's Amelie
10 best high-end laptops

10 best high-end laptops

From lightweight and zippy devices to gaming beasts, we test the latest in top-spec portable computers
Michael Carberry: ‘After such a tough time, I’m not sure I will stay in the game’

Michael Carberry: ‘After such a tough time, I’m not sure I will stay in the game’

The batsman has grown disillusioned after England’s Ashes debacle and allegations linking him to the Pietersen affair
Susie Wolff: A driving force in battle for equality behind the wheel

Susie Wolff: A driving force in battle for equality behind the wheel

The Williams driver has had plenty of doubters, but hopes she will be judged by her ability in the cockpit
Adam Gemili interview: 'No abs Adam' plans to muscle in on Usain Bolt's turf

'No abs Adam' plans to muscle in on Usain Bolt's turf

After a year touched by tragedy, Adam Gemili wants to become the sixth Briton to run a sub-10sec 100m
Calls for a military mental health 'quality mark'

Homeless Veterans campaign

Expert calls for military mental health 'quality mark'
Racton Man: Analysis shows famous skeleton was a 6ft Bronze Age superman

Meet Racton Man

Analysis shows famous skeleton was a 6ft Bronze Age superman
Garden Bridge: St Paul’s adds to £175m project’s troubled waters

Garden Bridge

St Paul’s adds to £175m project’s troubled waters
Stuff your own Christmas mouse ornament: An evening class in taxidermy with a festive feel

Stuff your own Christmas mouse ornament

An evening class in taxidermy with a festive feel
Joint Enterprise: The legal doctrine which critics say has caused hundreds of miscarriages of justice

Joint Enterprise

The legal doctrine which critics say has caused hundreds of miscarriages of justice
Freud and Eros: Love, Lust and Longing at the Freud Museum: Objects of Desire

Freud and Eros

Love, Lust and Longing at the Freud Museum