Wilson, who has been diagnosed with multiple sclerosis, was most recently issued with ‘P19’ disciplinary papers in October for mouthing off to prison officers in the Midlands Prison.
It is understood Wilson has been subject to such proceedings on a number of occasions since being jailed for conspiracy to kill Kinahan target Gary Hanley.
Sources said the highly dangerous criminal, who is medicated twice a day for the illness, suffers from a sedative effect in the immediate wake of taking his medication but is back to his usual ‘intelligent’ self within a relatively short period.
Proceedings in Wilson’s recent trial in the Special Criminal Court for the attempted murder of three men at the Players’ Lounge Pub in Fairview in 2010 were timed to accommodate Wilson’s medical regime.
On Monday of this week, the DPP officially entered a ‘nolle prosecui’ to the three attempted murder charges in the wake of Wilson entering a plea to conspiracy to murder.
In a letter to the DPP, Wilson denied being the hitman who shot the three men but admitted an organisational role in the botched hit targeting then Real IRA leader Alan Ryan.
The hit is understood to have been ordered by long-term career criminal Sean Hunt, also known as The Smuggler, who wanted Ryan dead.
In the letter, Wilson said he sourced the firearms and vehicles used and provided information about the getaway route and where to burn out the Volkswagen Golf used by the shooter.
He said he was acting on the instructions of dissident republicans and accepts that his role as a planner makes his involvement "deeper and more sinister".
As well as pleading guilty to conspiracy, Wilson (42) has pleaded guilty to an offence under the Firearms Act of possession of a .38 calibre Smith & Wesson revolver and a .32 calibre Zastava semi-automatic pistol on dates between July 24th and July 26th, 2010.
Wilson had pleaded not guilty to the attempted murders of Brian Masterson, Wayne Barrett and Austin Purcell at The Player's Lounge Public House, Fairview Strand, Fairview, Dublin 3 on July 26th, 2010.
Inspector Liam Donoghue told the court Mr Barrett was shot in the head, left buttock and thigh, Mr Purcell was shot in the chest, left forearm, groin and right foot, while Mr Masterson suffered a gunshot wound to the lower back and another to his right forearm.
By 2017 gardaí had identified Wilson as a member of the Kinahan crime gang and members of the National Surveillance Unit (NSU) were watching him and other known gang members as they planned the murder of Gary Hanley.
The NSU planted listening devices in two vans being used by the gang and overheard Wilson allegedly admitting to the Player's Lounge Shooting. Inspector Donoghue said that when gardaí played those recordings to Wilson following his arrest in 2018, he told gardaí: "I may have said it, but I didn't do it."
He later accepted that he had said what was on the recording but told gardai he was trying to "impress" the person with whom he was speaking.
He insisted he did not fire the shots, was not in the Volkswagen Golf and had nothing to do with what happened at the Player's Lounge, the inspector said.
In 2019 Wilson pleaded guilty to conspiring to murder Gary Hanley at a location within the State between September 15th and November 6th, 2017.
He was jailed for six years by the Special Criminal Court and is due for release from that sentence in May next year.
Inspector Donoghue agreed with Wilson's barrister Keith Spencer BL that Wilson has been diagnosed with multiple sclerosis, which is likely to make his time in prison more difficult.
Ms Justice Tara Burns, presiding, with Judge James Faughnan and Judge Sinéad Ní Chúlacháin, will hear pleas in mitigation from Wilson's senior barrister Padraig Dwyer before they pass sentence on December 15th.