Donnchadh Ó Laoghaire (Cork South Central, Sinn Fein) | Oireachtas source

The Garda Síochána opening statement states "that in July 2016, the Garda National Protective Services Bureau asked the Garda analysis service to conduct a comprehensive analysis of homicides with a domestic motive in the Republic of Ireland over a ten-year period". How did this issue first arise? How did it come to the attention of An Garda Síochána that there was a discrepancy or that there might be any issue regarding the recording of homicides?