In part three of our Vivian Maier series on Chicago Tonight at 7:00 pm, Jay Shefsky introduces us to several people trying to unravel the mystery of the celebrated photographer.

Watch part one and part two from earlier this week to learn more about Maier, and to view a slideshow of her photography.

Upcoming events:

- Vivian Maier: Out of the Shadows, book by Richard Cahan & Michael Williams, to be released mid-September

- Chicago History Museum: Vivian Maier's Chicago, 1601 N. Clark St. Chicago, IL 60614, opens September 8

- Thomas Masters Gallery: Vivian Maier: Out of the Shadows, 245 W. North Ave. Chicago, IL 60610, opens September 7