Mary Ann Sieghart talks to Chantelle Taylor

One to One allows journalists the chance to pursue their own passions by talking to the people who interest them most. Mary Ann Sieghart takes over the chair for the next three weeks talking to those who've killed another person. She says; "Killing another person is humanity's greatest taboo. Most of us, thankfully, will go through life without having taken someone else's. And it's precisely because I'll never know at first hand what it's like (I hope) that I'm so curious to get inside the mind of a killer. Whether it's someone who is sanctioned to kill, like a soldier; someone who kills accidentally, like a dangerous driver; or someone who does it on purpose, like a murderer, I want to know the answers to all sorts of fascinating questions. What goes through their mind at the time? How did it happen? How do they feel afterwards? And are they haunted by the event for the rest of their life?" In this first programme she talks to Chantelle Taylor, an army medic who shot a Taliban fighter when caught in an ambush in Afghanistan. Producer: Lucy Lunt.