For Matthew Alan Sheppard, all of the anxiety, deception, and delusion converged in one moment on a crisp winter weekend in February 2008. From the outside, he hardly seemed like a man prepared to abandon everything. At 42, he’d been happily married for 10 years, with a 7-year-old daughter and a comfortable home in Searcy, Arkansas. An environmental health and safety manager for the electrical parts maker Eaton, he’d risen in three years from overseeing a plant in Searcy to covering more than 30 facilities throughout North and South America. A recent raise had pushed his salary close to six figures. To his coworkers and hunting buddies, he seemed an amiable guy with a flourishing career.