CNN Special Presentation

For nine years, Bill Cosby has been accused of sexual assault, but he has said the stories are untrue and has never been prosecuted. Model Beverly Johnson says Bill Cosby's reputation was a secret in Hollywood for decades, one she wished she knew when he allegedly drugged her in the 1980s. A story with no joy attached that began as one stand-up comic called out Bill Cosby, America's favorite dad, as a rapist, to several decades' worth of dark allegations ignited by dozens of women accusing Cosby of a pattern of drugging and rape.

Investigators continue their quest for answers at Boston’s Isabella Gardner Museum, the site of history’s largest art heist.

Dr. Sanjay Gupta puts medical marijuana under the microscope again.