Builder who stabbed student in the neck and then claimed self-defence jailed

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A construction worker fuelled on ‘anger, cocaine and alcohol’ slashed a stranger’s throat and then had his dad cover for him.

Chas Corrigan, 22, knifed 20-year-old Mohammed Algasim in the neck outside student accommodation near the city’s railway station late on August 1 last year.

He had been drinking in a pub and taking cocaine on the night of the attack, which was described by prosecutors as ‘unprovoked and senseless’.

CCTV captures the moment Corrigan, coming home from the pub, walks past the Saudi Arabian student sitting outside his halls.

Words are exchanged before Corrigan walks away. He then turns back when someone in the group calls out to him.

He moves very close, lowers his face towards Mr Algasim, who stands up.

Within seconds, Corrigan took out an 8-inch kitchen knife he had stolen from a friend and had hidden in his shorts.

He swung it twice, cutting right through the flesh of Mr Algasim’s neck.

The family of Mohammed Algasim, who died following a fatal assault in Mill Park, Cambridge on Friday evening (1 August) have paid tribute. The 20-year-old, from Saudi Arabia, was on a 10-week placement studying English in the city when he died. In a statement, the family said: ?Muhammad Yousef Algasim. A young man brimming with enthusiasm, brimming with chivalry and courage. He was a dutiful son, a loving brother, and the leader of the family in spirit, not in appearance. He was cheerful, chivalrous, pure of heart, quick to give, and passionate about others. Over time, he became the family's charisma, leaving behind an unforgettable legacy in every gathering. He was his father's support, his familiar companion, and the assistant to his uncles and maternal uncles. He was the most compassionate person to ever visit a mother's heart and the closest to his sisters' embrace.? Chas Corrigan, 21, of Holbrook Road, Cambridge, appeared at Peterborough Magistrates' Court this morning. He has been remanded to appear at Cambridge Crown Court on Wednesday (6 August). A 50-year-old man, also from the city, was arrested on suspicion of assisting an offender. He remains in custody.
Mohammed Algasim, from Saudi Arabia, ‘was a dutiful son, a loving brother, and the leader of his family in spirit’ (Picture: Cambridgeshire Constabulary)

As a result, Mr Algasim sustained massive blood loss with a pathologist describing this as ‘torrential’.

The two men had never met.

Corrigan was found guilty of murder at Cambridge Crown Court on Thursday.

Video grab of the arrest of Chas Corrigan. A man has been sentenced to life for the murder of an overseas student studying English after he stabbed him in the neck.Chas Corrigan, 22, used a kitchen knife to stab 20-year-old Mohammed Yousef Algasim in Mill Park, Cambridge on the evening of August 1.Mohammed ran from the scene but collapsed moments later as a member of the public called for an ambulance.Three off duty doctors and paramedics found Mohammed bleeding heavily on the pavement. Photo released 04/06/2026
The arrest of Chas Corrigan (Picture: Cambridgeshire Constabulary)

Jailing Corrigan for life imprisonment with a minimum term of 22 years and six months, Mr Justice Dexter Dias told him: ‘Perhaps no one will ever understand why you did what you have done.

‘It was literally senseless.It made no sense. You were fuelled by alcohol and cocaine and anger. It is a lethal combination and proved to be fatal.’

The Judge added: ‘He states that the incident happened in “a blink of an eye” and “[I] truly thought I was going to get seriously injured.” He adds that his reaction was “to swing a weapon so close to someone in order to frighten them”.

‘He maintains his claims that this was an accident caused when he spontaneously reacted when he thought he was about to get seriously hurt. Like the jury, I reject this account.’

The kitchen knife used to stab Mohammed Yousef Algasim by Chas Corrigan. A man has been sentenced to life for the murder of an overseas student studying English after he stabbed him in the neck.Chas Corrigan, 22, used a kitchen knife to stab 20-year-old Mohammed Yousef Algasim in Mill Park, Cambridge on the evening of August 1.Mohammed ran from the scene but collapsed moments later as a member of the public called for an ambulance.Three off duty doctors and paramedics found Mohammed bleeding heavily on the pavement. Photo released 04/06/2026
The knife used in the attack
Peter Corrigan. A man has been sentenced to life for the murder of an overseas student studying English after he stabbed him in the neck.Chas Corrigan, 22, used a kitchen knife to stab 20-year-old Mohammed Yousef Algasim in Mill Park, Cambridge on the evening of August 1.Mohammed ran from the scene but collapsed moments later as a member of the public called for an ambulance.Three off duty doctors and paramedics found Mohammed bleeding heavily on the pavement. Photo released 04/06/2026
Peter Corrigan has been jailed for hiding his son’s high-visibility jacket (Picture: Cambridgeshire Constabulary)

His father Peter Corrigan, 50, of Cambridge, pleaded guilty to assisting an offender after concealing high-visibility clothing that his son had been wearing at the time of the attack.

He was jailed for two years, the CPS said.

Cheryl Williams, Crown Advocate, said: ‘Chas Corrigan claimed he acted in self-defence, but the evidence clearly showed this was not the case.

‘Our case was built on a strong combination of CCTV footage, including images of the attack itself, eyewitness testimony and pathology evidence.

‘This was a fatal and cruel act of violence which has had a devastating impact on Mohammed Algasim’s family and friends.

‘Nothing can undo their loss, but I hope today’s sentence provides some measure of justice.’

Mr Algasim’s father Yousef Al Qasim said in a victim impact statement read to the court on the first day of the two-day sentencing hearing that his pain was ‘beyond what words can express’.

‘The pain of sending a son abroad to study, full of hope for his future, only for him to return to us as a victim of senseless violence, despite having caused no problem to anyone, is beyond what words can express,’ he said.

Detective Chief Inspector Dale Mepstead, who led the investigation from the Bedfordshire, Cambridgeshire and Hertfordshire Major Crime Unit, said Corrigan ‘chose to arm himself with a knife and carry it in a public place, with devastating consequences’.

‘Mohammed was a young man with his whole life ahead of him, and his death has had a profound impact on all who knew him,’ she said.

‘Our thoughts continue to be with his family and friends as they come to terms with this tragic loss.’

Mr Algasim’s family said in a statement released through police: ‘This has been a very difficult journey for our family.

‘Losing Mohammed has left a deep void in our lives.

‘Whilst nothing can bring him back, today’s verdict recognises the seriousness and brutality of how his life was taken.’

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