In April 2015, 24-year-old Cork woman Karen Buckley went for a night out with friends in Glasgow, where she was studying to become a nurse.

When Karen did not return home or answer her friends’ calls, police began searching for her. Their investigation soon focussed on a man seen speaking with Karen outside a nightclub, moments after she was last seen by her friends.

Over the next few days detectives would conduct an intense, detailed investigation to trace Karen’s movements and identify the man she spoke with. Through the analysis of hundreds of hours of CCTV footage, public appeals, forensics and police interviews, a picture would soon begin to emerge. It would become a case that deeply affected people in both Ireland and Scotland, as the shocking, heart-breaking truth emerged.

In this episode of Lines of Enquiry, John Sweetman recounts that investigation in detail, and the impact of a crime that caused deep pain across two countries.

Presented by John Sweetman

Created by Darren Cleary

Episode Written by Anna Priestland

Script Edited by Eoin Brennan & Siobhan Walsh

Produced by Siobhan Walsh

Executive Produced by Eoin Brennan

Executive Produced by Ruth Fitzsimons

Sound Design and Editing by Neil Kavanagh

Audio Editing Support by Ed Smith

Marketing Support by Laura Bracken and Róisín Reilly

Social Support by Mark Hayes and Robyn Ree

Artwork and Graphics by Eric Rowntree