'' Prophet 's Prey '' , a documentary directed by Berg which explores the life of Warren Jeffs , premiered at the 2015 Sundance Film Festival . Berg adapted the film from Sam Brower 's book '' Prophet 's Prey : My Seven-Year Investigation Into Warren Jeffs and the Fundamentalist Church of Latter-Day Saints ''
2015 Sundance Film Festival
2015 Sundance Film Festival
Amy J. Berg