The suspected killers of inmate Robert O’Connor changed their clothes in a separate cell from where they beat him before calmly walking around the prison.
Sources have told how the four men acted as if “nothing had happened” in the aftermath of last Friday’s attack in Mountjoy Prison.
The investigation is continuing into O’Connor’s murder after his life-support machine was switched off in Dublin’s Mater Hospital in the early hours of Wednesday morning.
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