Question:  "Cold North Killers: Canadian Serial Murder" is a 2012 Canadian non-fiction book that documents the lives of sixty Canadian serial killers one of whom was a former what?
Context: My Life Among the Serial Killers: Inside the Minds of the World's Most Notorious Murderers is a book written by Helen Morrison, M.D and Harold Goldberg.  It presents the cases of ten serial killers, and touches on many more.  Morrison spent hundreds of hours in face-to-face interviews, over many years, with several of the subjects.  She uses the individual stories to explain and put forth her ideas on what makes a serial killer. Karla is 2006 American psychological thriller film written and directed by Joel Bender, and co-written by Manette Rosen and Michael D. Sellers.  It is based on the crimes of Canadian serial killers Paul Bernardo and Karla Homolka. A Short History of Progress is a non-fiction book and lecture series by Ronald Wright about societal collapse.  The lectures were delivered as a series of five speeches, each taking place in different cities across Canada as part of the 2004 Massey Lectures which were broadcast on the CBC Radio program, "Ideas".  The book version was published by House of Anansi Press and released at the same time as the lectures.  The book spent more than a year on Canadian best-seller lists, won the Canadian Book Association's Libris Award for Non-Fiction Book of the Year, and was nominated for the British Columbia's National Award for Canadian Non-Fiction.  It has since been reprinted in a hardcover format with illustrations. David Russell Williams (born March 7, 1963) is an English-born Canadian, convicted murderer, rapist, and former Colonel in the Canadian Forces.  From July 2009 until his arrest in February 2010, he commanded CFB Trenton, a hub for air transport operations in Canada and abroad and the country's largest military airbase.  Williams was also a decorated military pilot who had flown Canadian Forces VIP aircraft for dignitaries such as Queen Elizabeth II, Prince Philip, and the Governor General and Prime Minister of Canada. Cody Alan Legebekoff (born  1990 ) is a Canadian serial killer convicted in 2014 by the British Columbia Supreme Court of murdering three women and a teenage girl, between 2009 and 2010, in or near the City of Prince George, British Columbia.  This trial of one of Canada's youngest serial killers drew national attention. Female Serial Killers: How and Why Women Become Monsters is a non-fiction true crime history by Peter Vronsky, a criminal justice historian.  It surveys the history of female serial killers and female-perpetrated serial homicide, its culture, psychopathology, and its investigation from the Roman Empire to the mid-2000s. Macabre is an extreme metal band from Chicago, Illinois.  They blend thrash metal, death metal, and grindcore (sometimes with nursery rhymes and folk melodies) to form their own unique style dubbed murder metal.  Lyrically, they have a strong focus on serial killers, mass murderers and a touch of sick gore humor.  Most lyrics are based upon true stories and are about real infamous personalities.  The content of the lyrics is historically accurate, and band members actually have known and met with convicted serial killers such as John Wayne Gacy on a personal level.  They also have a side project called the "Macabre Minstrels" that play acoustic camp fire songs.  Their current label is Decomposed Records. Obsession is a non-fiction book written by John E. Douglas and Mark Olshaker about the psyches of serial killers, serial rapists, mass murderers, stalkers, and their victims, as well as how to fight back. Cold North Killers: Canadian Serial Murder is a 2012 Canadian non-fiction book written by Lee Mellor and published by Dundurn Press.  It documents the lives of sixty Canadian serial killers, with the earliest being Edward H. Rulloff and the most recent being Russell Williams.  The book uses Katherine Ramsland's interpretation of what constitutes a serial killer—someone who has killed at least two people on two separate occasions, and who attempted to or likely would have killed again—as outlined in her 2007 book "The Human Predator".  "Cold North Killer's" own definition of what constitutes a Canadian serial killer includes both Canadians who committed murder abroad (such as Keith Hunter Jesperson and Gordon Stewart Northcott) and non-Canadians who committed murder in Canada (like William Dean Christenson and Earle Nelson). The eleventh season of "", a Canadian serial teen drama television series, premiered on July 18, 2011, concluded on May 18, 2012, and consists of 45 episodes.  Although only two school years have passed in the story timeline since season six, part one of season eleven is set in the final weeks of the spring semester, while part two is set in the fall semester in the years it aired.  Writers have been able to use a semi-floating timeline, so that the issues depicted are modern for their viewers.  The first half of this season again depicts the lives of a group of high school sophomores, juniors, and seniors while the second half of this season depicts the lives of a group of high school freshmen, juniors, and seniors as they deal with some of the challenges and issues that teenagers face such as gang violence, parenthood, transphobia, homosexuality, drug use, dysfunctional families, mental disorders, adoption, organ transplantation, crime, bulimia, alcoholism, sex, drug abuse, and relationships.
Answer: Colonel in the Canadian Forces