Joanne O’Brien

Detective Superintendent Joanne O’Brien is a member of the Garda Síochána in Ireland, currently involved in the cold case investigation of the murder of French film producer Sophie Toscan du Plantier, which occurred nearly 30 years ago. She is part of the team working to identify DNA evidence found on the victim's boot, seeking international assistance under the Prum Convention to match the DNA with samples from other countries.