Beyond a barbed-wire fence and a locked metal door, David Berkowitz sat across from me in a visiting room at a maximumsecurity prison in upstate New York. He was remembering a favorite song, "Amazing grace," he sang, his head swaying slightly, rhythmically, back and forth, "how sweet the sound, that saved a wretch like me" His voice, revealing its Bronx roots, now rose, if only briefly, to a higher, nasal pitch that echoed within the stone-walled white room. "I once was lost. but now I'm found; was blind, but now I see." Berkowitz looked up, his blue eyes as wide as ever. "It's a bit like my life," he said, summing up his 11 years as a born-again Christian. "The person you saw when I was arrested, that was Satan's creation. But then there's a happy ending, where God comes in and transforms me."