Description: Over the last 20 years, Dr. Barbara Kirwin has confronted hundreds of killers, working to weed out the truly mad from the bad who try to cop an insanity plea. Now, in chilling detail, she profiles her most grisly cases -- Chandran Nathan, who fiddled the medical student fiance of his goddaughter with 41 shots from an MAK-90; college student Stephanie Wernick, who suffocated her newborn baby and tossed the infant's body into a dormitory trash can; Richard Winkler, who disemboweled his minister as he prayed on Thanksgiving morning -- and takes the reader on a compelling journey into the heart of human darkness to determine whether these killers were truly insane.

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