Mary Ellen O’Toole, PhD, a recently retired FBI profiler who now teaches at the FBI National Academy, Quantico, Virginia. While with the FBI, she worked on many high-profile cases, including the Unabomber and Green River Killer cases. She is author of Dangerous Instincts: How Gut Feelings Betray Us (Hudson Street). www.DangerousInstincts.com
A man charged with a string of murders in western Canada this past October was described as “a normal guy”…