The Unknown Darkness also explores the strengths and pitfalls of modern criminal investigation and offers vivid details about what happens at a crime scene, what is actually involved in bringing a killer to justice, and finally what kind of a person is able to devote his or her life to grappling with the predators among us. Daring to relive the often harrowing experiences of his time with the FBI, McCrary has put together an eye-opening account of ten of America's most frightening and riveting manhunts. He has also written an engrossing narrative on our justice system -- from the perspective of someone who has lived it day to day.