After 13 years evading capture mark Lilley was arrested by Spanish police today after being found naked, hiding in his panic room.
The panic room was concealed behind a wardrobe in his bedroom at his Spanish villa.
The joint Spanish National Police and Serious Organised Crime Agency (Soca) operation involved more than 40 armed officers.
Dave Allen, head of the Fugitives Unit at Soca, said: "Lilley was a dangerous man with access to firearms. He had evaded capture for a long time by moving around Spain and using false identities. Now he's behind bars where he belongs and extradition proceedings are under way.
"My message for other fugitives on the run is a simple one - we will hunt you down and you will face justice for your crimes."
More top news
If you have been affected by an issue in our Changing Minds series, are in distress or need some support, help is available 24 hours a day.
The former Deputy Speaker of the House of Lords has resigned following allegations he took drugs with prostitutes. But who is he?
A murder investigation has been launched after a man was fatally stabbed and another injured in an apparent attack at a house in York.