'The Witness' review: Documentary revisits Kitty Genovese killing

At first glance, the title of "The Witness" would seem to reference the 38 residents of Kew Gardens in Queens, N.Y., who were pilloried in the press for their apparent indifference to the screams of 28-year-old Kitty Genovese as she was stabbed to death outside their windows. In the decades since...