Book excerpt: Lawyer Robert Beattie assisted the police during the thirty-year search for the BTK Strangler—and was instrumental in the long-awaited arrest of a suspect. Here he shares his inside knowledge of the case, from its terrifying beginnings to its most up-to-date developments. In 1974 a killer embarked on a murder spree in Wichita, Kansas, counting among his victims, men, women, and children. Longing to join the ranks of the Hillside Stranglers and Black Dahlia killer, the elusive sex murderer taunted authorities and the media with clues, puzzles, and obscene letters. Then in 1979, he vanished. The killings appeared to have stopped, and one of the longest and most baffling manhunts in the annals of crime came to a dead end. But in 2004, a letter—and a grisly clue—arrived at a Wichita paper. And with it, a terrifying implication: BTK was back. The biggest shock of all came when they made their arrest. Now, from his unique vantage point, Robert Beattie tells the complete story of one of the most intriguing and horrifying serial murder cases in American history.