Namaste and hello, I am Anupama Raghunathan and this is Trace Evidence, where I take one forensic technique each week and explain how it really works. I spent eleven years looking at fingerprints under a magnifier, so we are starting with my own field, and with the case that humbled it. In March 2004, after the train bombings in Madrid, Spanish police found a partial print on a bag of detonators. The FBI ran it through their database and three examiners agreed it belonged to a lawyer in Oregon called Brandon Mayfield. He had not left the United States in years. In this episode I will show you what a match actually means, how examiners compare ridge detail, and how smart, careful people talked each other into a mistake. You are listening on Witspeak Podcasts. Let us look closer.