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A British man suspected of being in the ISIS execution gang dubbed “The Beatles” is the grandson of a former musician with The Specials

Aine Davis, 32, was clutching an AK-47 in Syria when his grandfather, trombonist Rico Rodriguez, died last year aged 80.

Davis is thought to have operated as a guard at an ISIS prison holding foreign hostages in Syria.

His Rastafarian grandfather had played on hits Ghost Town and Message To You, Rudy.

Rodriguez was born in Havana, Cuba, and moved with his family to Jamaica at an early age.

(Image: Getty)

He grew up in Kingston, Jamaica, and was taught to play the trombone by his slightly older schoolmate

It was said the real Fab Four decided to grow their hair after seeing him play at a West Indian party.

Read more:Brit pal of Jihadi John may have been planning Istanbul attack

He was in Jools Holland’s Rhythm and Blues Orchestra for 16 years until 2012 and was awarded an MBE for services to music in 2007.

Davis, son of Rico’s daughter Fay, was raised in Hammersmith, West London, but joined a gang and dealt drugs.

He was locked up for possessing a firearm in 2004 and is believed to have been radicalised behind bars. He is suspected of being “Ringo” — one of a four-strong British death squad in Raqqa which included “Jihadi John” Mohammed Emwazi, killed by a drone strike in November.

(Image: REUTERS/SITE Intel Group)

Davis is now in a Turkish prison after being among those held in an anti-terror raid on a £1.3million mansion on the outskirts of Istanbul.

Read more:Inside the London mosque where ISIS 'Beatles' came together

Security chiefs fear he was helping plan a Paris-style attack on a European city. His parents declined to comment last night, but a source said: “This has been a horrible period for the family.”