"How that man was able to go out to that storage shed, time after time, and bury one more dead boy is something I'll never understand. You get close to evil like that, no matter how long ago it was, and it never leaves you." Detective David Mullican, recollecting the Houston Mass Murders, April 2011 During the early 1970s, more than three dozen teenage boys went missing from the working-class neighborhood of Houston Heights,...