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A qualified doctor who beheaded and mutilated his friend at a Paddy Power betting shop was today found not guilty of his former housemate's murder.

Hassan Mustafa was today found not guilty by a jury by reason of insanity - despite there being no question that he had decapitated Khalid Yousef.

They met when Mustafa and Mr Yousef both came to the UK from Sudan after seeking political asylum in 2013.

Mustafa was a qualified surgeon who was in the top 5% of students in America and had appeared set for a career at the top of his profession.

But shortly before this time, Mustafa had told his parents he no longer wanted a career as a doctor, Birminghamlive reports .

The two men lived together in a flat in Liverpool before they moved to Birmingham, living seperately in the Midlands.

While Mustafa took on jobs such as a carer and labourer Mr Yousef found work at a Birmingham hotel and later in Boots.

Mustafa went on to marry his wife Caroline and lived in Stratford Road, Sparkbrook, while Mr Yousef went to live in Greenhill Road, Handsworth.

The two men remained friends but Mr Yousef was distancing himself more and more in the months leading up to the murder as Mustafa acted more and more strangely.

Mr Yousef's girlfriend said Mustafa would come knocking on the door to see him and Khalid would hide and say: 'I don't want to see him'.

Mr Yousef was a regular at Paddy Power and Mustafa knew he would find him there.

CCTV captured the moment Mustafa entered the the Paddy Power shop.

A few minutes later entered the shop armed with up to four knives, the court and asked Mr Yousef if he could have a word outside, where they began fighting.

Mr Yousef went back inside followed by Mustafa wielding a huge bread knife.

Despite efforts by customers and members of staff to break it up it escalated and as Mustafa began stabbing his victim the Paddy Power manager triggered off the security 'fog cannon' which filled the bookmakers with smoke.

As terrified members of staff hid at the back of the premises armed police stormed the bookies shop.

As the fog cleared Mr Yousef's body could be seen slumped up against the customer door - Mustafa standing over him.

Mr Yousef had been beheaded and his face and right hand mutilated.

Speaking after the verdict at Birmingham Crown Court, Judge Melbourne Inman said: "This is a very sad and tragic case. He has been acquitted of murder because of the terrible mental illness he suffered.

"The affect of the verdict is that I make a hospital order and I make a restriction order. The affect of that is Mr Mustafa will return to Reaside Clinic but a decision if he is ever released will be made by the Secretary of State.

"I can't understand the grief Mr Yousef's family have suffered but they have shown such great dignity."