Liverpool gangster Richard Caswell received medical treatment earlier this year after being attacked in his jail cell
The ECHO understands the wounds inflicted on Caswell after men burst into his cell were able to be treated by medical staff at the prison on January 10.
A source told the ECHO Caswell was 'slashed up' by a group of men who burst into his cell.
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Caswell has been in HMP Manchester, known by many as Strangeways, since 2020.
This attack is just one of many incidents that have launched the gangster into the public eye.
Now in his late 30s, Caswell first rose to infamy in Merseyside after plotting a series of car bombings that rocked the country.
He had been involved in a feud between a gang of drug dealers and the Lynch family, owners of the city's famous Club 051.
Caswell, 23 years old at the time and known as “Will Young” because of a resemblance to the star, was a doorman and assisted in setting up the car bombs.
He parked vehicles outside two homes and West Derby Road police station, in Tuebrook, so they could be filled with fireworks and petrol and detonated, firing shards of metal into nearby buildings in 2003 and 2004.
At the time, the explosions were the biggest ever on the British mainland.
Forensic experts linked him to the scene and a court heard he was “not the brains” behind the project but “a willing foot soldier” who did the dirty work for his bosses after getting drawn into the gangland feud.
The now 38-year-old was told he could have "killed or mutilated" those nearby to the terrifying blasts and was handed a 17-year sentence in 2005.
Shortly before being sentenced that April, he became known for a botched escape attempt from HMP Walton.
That saw his associates try to free him using a cherry picker.
Reports from the Liverpool Daily Post at the time of the escape said a member of the public spotted the vehicle just outside the prison’s perimeter wall on Hornby Road.
It is understood prison officers became aware Caswell was missing around the same time the cherry picker arrived, shortly before 7.30pm on March 14, 2005.
A team of officers foiled the attempt when they caught up with Caswell in the grounds of the prison and escorted him back inside.
He was then held in a segregation unit.
The Prison Officers' Association said at the time Caswell’s was the most serious attempt to break out of HMP Liverpool in its history.
Caswell has occasionally come into the public eye since then.
In 2011, he attacked a fellow prisoner at HMP Full Sutton, adding another ten months to his prison sentence.
Just last year, Caswell went missing while wanted on recall to prison.
At the time, members of the public were warned not to approach him and contact police.
He was later brought back before the courts in Manchester, accused of conspiracy to supply Class A drugs.
Caswell entered guilty pleas to those offences last November and will be sentenced later this year.