This week we're taking a look at two very different types of white collar crime -- financial fraud and painting forgery -- and how we use investigation and science to detect them. We'll speak to Jennifer Fiddian-Green, a partner at Grant Thornton and lead of their National Forensic and Dispute Resolution Advisory practice, about forensic accounting and the ways we try to discover fraud. And we'll talk with Dr. Jehane Ragai, Emeritus Professor of Chemistry with the American University in Cairo, about her book "The Scientist and the Forger: Insights into the Scientific Detection of Forgery in Paintings".