A Donegal school caretaker who sexually abused a pupil returned to the same job and abused and raped four other boys.
The boys, who were aged between 10 and 17 at the time, were sexually abused on an almost weekly basis.
The Central Criminal Court heard the man made them watch pornography and groomed then by supplying them with alcohol, cigarettes and money.
The 55-year-old man, who cannot be named for legal reason, pleaded guilty to 38 sample charges.
The litany of charges included oral and anal rapes, sex assaults, and two charges of production of child pornography on dates between July 1990 and September 2005.
The man had earlier been convicted in a District Court in Donegal for two incidents of indecent assault at the same school in 1985 and 1986.
He was not identified at the time and he returned to work in the same school where the abuse continued.
He is due to be sentenced later this month.
Ends