Quirke told gardaí his 'only crime' was having an affair with Mary Lowry

While Patrick Quirke did not take the stand in his trial, his garda interviews gave a clear insight into his toxic on-off relationship with Mary Lowry, his feelings about her new relationship with the victim and how that triggered the murder of Bobby Ryan.
He told gardaí he was afraid of Mary Lowry and described his ex-lover as "vicious" and "verbally abusive".