Founder of the FBI's National Art Crime Team, Wittman spent two decades recovering stolen cultural property valued in the hundreds of millions of dollars. His undercover work spanned continents and helped establish art crime as a serious field of law enforcement rather than a romantic footnote. he also wrote a great book: https://www.amazon.com/Priceless-Undercover-Rescue-Worlds-Treasures-ebook/dp/B0036S4BRG?ref_=ast_author_mpb Here's a talk by Wittman: https://www.youtube.com/watch?v=pfnICrTyhHM
