|Tuesday, Jan 31, 2012 - 6:00 AM
"Mystery of a Masterpiece"
In October 2009, a striking portrait of a young woman in Renaissance dress makes world news headlines. Originally sold two years before for around $20,000, the portrait is now thought to be an undiscovered masterwork by Leonardo da Vinci worth more than $100 million. NOVA meets a new breed of experts who are approaching "cold case" art mysteries as they deploy new techniques to combat the multi-billion dollar criminal market in stolen and fraudulent art. G