Each murder trial brings its own tangle of evidence, legal parameters, medical factors, social circumstances, and personalities. The tangle gets trickier when we must keep in mind that: "e;A person shall not be criminally responsible for an act or omission if they suffer from a mental disorder such that they were not able to appreciate the nature and quality of their act or to know that it was wrong."e; Forensic Psychiatrist Stanley Semrau takes us through some of the more terrible and fascinating tales from his career and from historical sources, including several cases that came to national attention: Clifford Olson and Terry Driver (The Abbotsford Killer) and the Daniel McNaughten case that marked the beginning of the insanity defense in Britain in 1843. These chilling and thought-provoking stories delve deep into the psychiatric aspects of homicide law and into the psychology of the muderous mind. Semrau's examination of these thrilling cases also offers a critique of the existing laws in Canada as he argues for profound changes.