Millionaire branded one of UK's most dangerous gangsters is found dead in his cell aged 29

A vicious thug branded one of Britain's most dangerous gangsters after a string of violent crimes has been found dead in prison .

Gary Black’s body was discovered in his cell bed at HMP Low Moss, near Glasgow, on Sunday. It is understood the 29-year-old died from natural causes.Underworld sources said Black, from Airdrie, was a feared and violent criminal in Lanarkshire’s drug trade.

A former victim told the Daily Record : “He has been involved in so much violence in his “He was a big deal in the drugs world. Black was supplying Airdrie with cocaine and heroin after terrorising other dealers into giving up.

He was found dead at Low Moss prison (Photo: Daily Record)

"It’s been claimed that he made upwards of £2million from his drug dealing. He owned houses all over the place.”

Black’s criminal record stretched back to December 2001, when he was convicted of a sex assault when he was aged just 14.

On Valentine’s Day 2004, he carried out a savage attack on 18-year-old Kenneth Baillie. When the case came to court in 2006, Sheriff Alfred Vannet branded him one of the UK's "most dangerous men”.

Black, who had already served 18 months for two earlier violent attacks, was on bail at the time.

He was also involved in the brutal attack in Airdrie that led to the death of Steven Pettigrew, 16, in April 2004.long criminal career, it is ironic that he has died from natural causes.