1979 Michael Ferry is expelled from the seminary at Maynooth for "inappropriate behaviour", thought to be the possession of pornography.
1984 Ferry works part-time as a teacher at Pobalscoil Gweedore teaching religious education. He also starts work for the youth organisation Foroige, a post he holds for three years.
1985 Ferry lands a part-time job as janitor and caretaker at Ardscoil Mhuire, a former secondary school in Gweedore used as a centre for Irish language pupils from across the country.
1986 First recorded case of Ferry sexually abusing a boy.
1991 Ferry abuses several other boys repeatedly in an office at the school.
2002 Ferry pleads guilty to sex assault charges in relation to the 1986 case. He is given a suspended sentence and placed on the sex offenders register for five years.
2003 to 2009 Ferry continues to work for Colaiste Cholmcille while abusing boys at the premises.
2011 Ferry is jailed after pleading guilty to 38 charges, including 17 oral and anal rapes, 18 sexual assaults, one indecent assault and two charges of production of child pornography. Separate garda and HSE investigations begin into the case.