The troubled life and demise of Vincent van Gogh follows a well-known trajectory: the precocious genius, the art world's indifference, the onset of angst and madness, and then, tragically, his suicide at age 37.

Or so we thought. But according to the groundbreaking research of Pulitzer Prize-winning biographers Steven Naifeh and Gregory White Smith, the painter didn't shoot himself: he was killed. When they first exposed this theory in their 2011 biography "Van Gogh: The Life," it was viciously attacked and contested. Rewriting history is not an easy task.