- Mass shooting survivors react to Colorado shootings
- Some survivors may lose will to live, author says
- One survivor developed fetish for serial killers, writer says
- Author: "That monster is part of every decision they make"
(CNN)Brent Doonan saw the bright muzzle flash of the Colt .45-caliber revolver and crashed facedown to the floor. He watched as his blood spread in a widening pool on his office carpet.