The Serial Killer's ApprenticeElmer Wayne Henley, Jr. was only fourteen when he first became entangled with serial rapist and murderer Dean Corll in 1971. Fellow Houston, Texas, teenager David Brooks had already been ensnared by the charming older man, bribed with cash to help lure boys to Corll's home. When Henley unwittingly entered the trap, Corll evidently sensed he'd be of more use as a second accomplice than another victim. He baited Henley with the same deal he'd given