Gangland tensions have escalated enormously -- with the return of crime boss 'Fat' Freddie Thompson, now under 24-hour surveillance. The garda's Organised Crime Unit have been monitoring Thompson's activities on a "round-the-clock basis" since his return.
'Fat' Freddie spent a day at the Rotunda Hospital on Monday where his sister Lisa Jane gave birth to her first child, Jamie.
The gang boss (inset below) is said to be still "furious" after his brother and mother were targeted in feud related attacks.
Sources say that "top-of-the list" is a 24-year-old criminal present during a violent incident in which Freddie's brother suffered a broken leg in a south city pub in March.The savage attack on Freddie's brother Ritchie (40) and his wife Catherine at the Karma Stone pub in Camden Street has still not been avenged.
Gardai fear the criminal responsible for the assault is a dead man walking.
To compound the situation for this member of the so-called 'King Ratt' faction, Thompson also blames the fellow criminal for throwing a pipe bomb into the garden of his family home earlier this summer.
This incident led to Thompson's mother being evacuated from the south inner city property in the early hours of the morning.
Sources say that 'Fat' Freddie has not returned to his family home while in Ireland and has been staying in city centre hotels.
It is unclear if he has met up with his long term girlfriend Vicky Dempsey, who is from Crumlin, during his time in Ireland.
But sources say that he has been in contact with a number of his close associates -- including his first cousin, Liam Brannigan. Brannigan was arrested by members of the Organised Crime Unit after a pipe bomb was seized in the west of the city last month but was later released without charge.
This is not Thompson's first visit back to Dublin this year and it is understood that he has been back in Ireland on at least two occasions since January.
Sources say that the gangster who leads one of Ireland's most notorious drugs gangs has been mainly based in Birmingham since 2011.
Despite earlier reports, a European Arrest Warrant is not in place for Thompson in relation to a massive police operation in Spain last year which led to his drug supplier, Christy Kinahan, and other senior gang members being arrested and charged.
At a murder trial earlier this summer, it emerged that 'Fat' Freddie wanted to kill gangland supergrass and Crumlin criminal Joey O'Brien.
The court heard evidence that by the summer of 2005, his life was under threat because he had fallen out with a well-known, notorious criminal -- understood to be Thompson -- who had become associated with him when he was a teenager.
O'Brien agreed that this drugs boss came down heavy on him and that he told a garda that this individual was threatening to shoot him over a debt and for informing on him to the gardai.
O'Brien agreed that his father -- who had been in the Army all his life -- had to put up a sum of money to get this criminal off his back.
Sources say that 'Fat' Freddie is very close to his younger sister who has no involvement in crime.