Theo Snyder is at the end of his rope. One minute he was on top of the world, his documentary film The Basement a massive critical and commercial hit, the next crestfallen when his latest film was canceled after an embarrassingly public misstep. As his desperation grows, he makes a bold decision: to pursue the story of the notorious "Halo Killer," Jasper Ross-Johnson. But delving into the life and mind of a serial killer could prove more deadly than...