In 1997, two women were mutilated and murdered on the grounds of a psychiatric hospital in Grangegorman, Ireland. Only months later, a young couple named Catherine and Carl Doyle were slaughtered in their countryside home in front of their four young children. All four of the victims were murdered at the hands of a young father named Mark Nash, who would eventually become known as one of Ireland's most violent and gruesome killers of all time.

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Sources:
1) REPORT OF THE COMMISSION OF INVESTIGATION ON DEAN LYONS
2) Article from Independent.ie/irish-news "Portrait of a serial killer: Mark Nash showed no emotion"
3) Article from Independent.ie/irish-news "I think he's a monster - Mark Nash's daughter describes shocking moment she discovered her dad was notorious killer"
4) Article from www.thejournal.ie "Grangegorman murders: Serial killer's appeal against his conviction is rejected"

#grangegormanmurders #marknash