British killer arrested in Spain after 17 months on the run

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A fugitive accused of stabbing a British national to death in the Algarve three years ago has been arrested in Spain following a massive manhunt.

William Hunter, 34, was apprehended by Guardia Civil officers in Alicante on September 15 for the murder of his roommate, Elliot Mulligan, 22, in April 2022.

National Crime Agency international liaison officers coordinated the exchange of intelligence and information between law enforcement agencies to track down Hunter.

And his arrest comes after months of extensive work between the NCA, Guardia Civil’s fugitive team, Portuguese Judicial Police and Merseyside Police.

The UK police force has also provided ongoing support to Elliot Mulligan’s family. Hunter was convicted of murder in May 2023, but lodged an appeal against the Portuguese court’s judgment.

William Hunter's arrest in Spain. Video shows a Brit being arrested for murder in Spain - after 17 months on the run.William Hunter, 34, stabbed his roommate to death in the Algarve, Portugal in 2022.He has now been arrested in Spain following an intensive National Crime Agency (NCA) coordination manhunt.William was apprehended by Guardia Civil officers in Alicante last week (15 September). Photo released 25/09/2025
He’s now back in custody after a manhunt (Picture: SWNS)
William Hunter's arrest in Spain. Video shows a Brit being arrested for murder in Spain - after 17 months on the run.William Hunter, 34, stabbed his roommate to death in the Algarve, Portugal in 2022.He has now been arrested in Spain following an intensive National Crime Agency (NCA) coordination manhunt.William was apprehended by Guardia Civil officers in Alicante last week (15 September). Photo released 25/09/2025
William Hunter was tracked down by the Guardia Civil (Picture: SWNS)

While waiting for the result of the appeal, he was released from custody on bail in April 2024 following the expiration of his maximum remand period.

He breached his court-imposed bail conditions and fled, sparking the major multi-agency manhunt that led to his arrest.

Hunter remains in custody in Spain while extradition proceedings continue.

NCA Head of Europe Gill Duggan said: ‘Above all, our thoughts remain with Elliot’s family, who have endured an unimaginable loss and the painful reality that the man responsible had not been held accountable for his violent actions.

‘Our pursuit of Hunter was relentless, driven by a deep commitment to securing justice for those who love Elliot.

‘With thanks to our partners at Merseyside Police and in Spain and Portugal, Hunter is behind bars where he belongs, and where he will remain for a long time to come.’

Merseyside Police Detective Superintendent Mark Drew said: ‘The arrest of William Hunter was part of a joint operation between Merseyside Police, NCA, Guardia Civil’s fugitive team and Portuguese Judicial Police.

‘We are committed to working with our partners to capture those that evade law enforcement and bring them to justice.

‘We will continue to support Elliot’s family, as they finally see justice being done after their tragic loss, we hope that the arrest of William Hunter brings them some comfort.’

Get in touch with our news team by emailing us at webnews@metro.co.uk.

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