Ever wonder how DNA is actually used to crack cold cases? Dr David Bruce is a forensic DNA specialist and the Cold Case DNA Casework Coordinator at NSW Health Pathology’s Forensic & Analytical Science Service (FASS). He talks about the remarkable advances in this field over the past few decades, takes us behind the scenes of some high-profile cases that police have solved thanks to DNA breakthroughs and looks back over the highlights of his 40 year career in science.