The DPP decided to prosecute 612 people for domestic violence last year.
It has decided to take 2,000 people to court for the offence since 2019, according to freedom of information files.
The DPP opted to prosecute 629 people for the crime in 2021 - but only 252 two years earlier.
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Criminal barrister and Fine Gael senator, Barry Ward, says it's normally a straightforward offence to bring to court.
