Mark Nash yesterday was found guilty of murdering two women in Grangegorman in Dublin 18 years ago.
The 42-year-old, who used to live at Prussia Street and on Clonliffe Road in Dublin, had denied stabbing 59-year-old Sylvia Shiels and 61-year-old Mary Callinan to death while they slept in their beds.
The jury returned a unanimous verdict of guilty on both charges.
Nash, who is originally from England, is already serving life in prison for murdering his ex-girlfriend's sister and her husband in Roscommon - also in 1997.
When arrested for those murders he admitted to the Grangegorman killings, but later withdrew his confession.
This morning, Alan Bailey, Retired Garda detective and former head of Cold Case Unit, spoke to Newstalk Breakfast about working on the case:
