In June 1996, the campaigning Irish journalist Veronica Guerin was murdered by a hit squad as she waited in her car at a set of traffic lights. Guerin had become famous in Ireland for exposing the activities of the country's drug barons. Her life was later turned into a Hollywood film. Simon Watts talks to Guerin's friend and fellow journalist, Lise Hand. PHOTO: Veronica Guerin (Getty Images).