About CSI: Crime Scene Investigation Season 12, Episode 4 :

The former Mayor of Las Vegas is shot at the Mob Museum and the CSIs embark on a history lesson in search of clues. Guest Stars: Marg Helgenberger, Elisabeth Harnois, Wallace Langham, David Berman, Frances Fisher, Phillip Rhys, Karen Bethzabe, Ana Isabel Merez, Joyce Hyser, Michele Lainevool, David Del Rio, John Fantasia, Brian Patrick Mulligan, Natalina Maggio, Vince Corazza, Monique Gabriela Curnen, Sheeri Rappaport, Barbara Eve Harris, Tino Struckmann, Marc Vann,