Chasing Evil tells the story of the evolution of modern fugitive investigations within the United States Marshals Service and the pursuit of notorious criminals Andrew Phillip Cunanan, Rafael Resendez-Ramirez (The Railway Killer), the Texas Seven, and John Allen Muhammad and Lee Boyd Malvo, better known as the Beltway Snipers. It describes outstanding investigative effort, new technologies, camaraderie, partnerships, tragic and brutal murders, and the enthusiasm, emotion, and passion during these intense investigations. Chasing Evil takes you through high-profile investigations for a serial killer, spree killers, escaped inmates, domestic terrorists, cop killers, and desperate criminals. It describes the progression of America's oldest federal law enforcement agency into the most successful and respected fugitive investigative organization in the world. Recognized historically as part of the lore of the Old West, the U. S. Marshals Service has played a critical role in the outcome of some of the most important investigations in the past forty years. Since 1979, the U. S. Marshals Service has partnered with local, state, federal, and international agencies to bring the most violent and dangerous fugitives to justice. The cases intersect with communities from San Diego, where spree killer Andrew Cunanan was raised, to our nation's capital, where the Beltway Snipers created fear and chaos during a three-week period in October of 2002. The murderous path of the Railway Killer across six states and into Mexico, over 13 years, is examined and detailed. After escaping from a Texas prison, the Texas Seven killed Irving Police Officer Aubrey Hawkins on Christmas Eve before leading law enforcement on a month-long chase which ended in the mountains of Colorado. Although separate investigations, these men had several traits in common. Each one of them was dangerous, violent, and evil.