The notorious gangster James Whitey Bulger was murdered by inmates just seven minutes after the doors to his cell were unlocked on his first morning at Hazelton Prison in West Virginia.
Last week, a trio of prisoners were charged in relation to Bulger's death.
Paul J. 'Pauly' DeCologero, 48, and Fotios 'Freddy' Geas, 55, were both charged with beating Bulger to death in his cell on 30 October 2018.
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Sean McKinnon, 36, was also charged with Bulger's murder for allegedly acting as a lookout while the 89-year-old was beaten with a belt.
The Boston gangster was murdered less than 12 hours after he was transferred to Hazelton Prison. He had arrived at the prison at 8:30pm on 29 October 2018.
Surveillance footage showed Geas and McKinnon meeting with DeCologero in their cell at 5am the next morning, an hour before the brutal murder took place.
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Cell doors were opened at 6am for prisoners to leave for breakfast, with Geas and DeCologero entering Bulger's cell at 6:06am before leaving at 6:13am
McKinnon did not enter but was instead sat at a nearby table in view of the offences station and Bulger's cell.
A recorded phone call revealed that McKinnon had reportedly discussed Bulger's arrival with his mother, who had urged him not to get involved.
During the call, McKinnon told his mother that inmates were 'getting ready to get another higher profile person here tonight'.
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When told to stay away from Bulger, he responded: "Ah, I can't."
Assistant US Attorney Hannah Nowalk has described the call as evidence that the trio had been planning the murder prior to Bulger's arrival.
DeCologero and Geas were both charged with aiding and abetting first degree murder. while McKinnon was charged with lying to the FBI.
Bulger's attorney, Hank Brennan, has called the charges against the three men 'inconsequential', as he explained that the Bulger family hold the Bureau of Prisons responsible for his death after they made the decision to move Bulger from a secure unit.
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Bulger was serving a life sentence for 11 murders at a secure unit prison before being moved to the general population at Hazelton Prison.
The gangster had led the Winter Hill Gang in Somerville, Massachusetts. He went on the run in 1994 after he was accused of 19 murders and remained at large until 2011.
It wasn't until November 2013, that the wheelchair-bound criminal was handed two life sentences.
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Geas was a known Mafia enforcer in Massachusetts. He was serving a life sentence for a pair of gang-related murders. DeCologero was a member of a Massachusetts gang who robbed rival gangs. He currently has four years left of his 25-year sentence for his involvement in the murder of a teenage girl.
McKinnon was released form prison earlier this year after completing a prison sentence.
US attorneys have asked a Florida judge that McKinnon be detained until his trial.
Topics: Crime