Question: Cold North Killers: Canadian Serial Murder includes a serial killer who committed murders in Canada, but was of what nationality?

full_context: Document 1: Dennis Nilsen: Dennis Andrew Nilsen (born 23 November 1945) is a Scottish serial killer and necrophiliac, also known as the Muswell Hill Murderer and the Kindly Killer, who murdered at least 12 young men in a series of killings committed between 1978 and 1983 in London, England. Convicted of six counts of murder and two of attempted murder at the Old Bailey, Nilsen was sentenced to life imprisonment on 4 November 1983, with a recommendation that he serve a minimum of 25 years. He is currently incarcerated at HMP Full Sutton maximum security prison in Full Sutton in the East Riding of Yorkshire, England.
Document 2: Robert Pickton: Robert William "Willy" Pickton (born October 24, 1949) of Port Coquitlam, British Columbia, Canada, is a Canadian serial killer convicted in 2007 of the second-degree murders of six women. He was also charged with the deaths of an additional 20 women, many of them from Vancouver's Downtown Eastside; however, these charges were stayed by the Crown in 2010. In December 2007, he was sentenced to life in prison, with no possibility of parole for 25 years – the longest sentence then available for murder under Canadian law.
Document 3: Cold North Killers: Canadian Serial Murder: 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).
Document 4: Luka Magnotta: Luka Rocco Magnotta (born Eric Clinton Kirk Newman; July 24, 1982) is a Canadian murderer, convicted of killing and dismembering Lin Jun, a Chinese international student, before mailing Jun's hands and feet to elementary schools and federal political party offices. This act gained international notoriety. After a video depicting the murder was posted online in May 2012, Magnotta fled Canada, becoming the subject of an Interpol Red Notice and prompting an international manhunt. He was apprehended at an Internet café in Berlin while reading news about himself in June 2012. After eight days of deliberations, a jury convicted him of first-degree murder on December 23, 2014. He was previously sought by animal rights groups for allegedly uploading videos of himself killing kittens.
Document 5: Karla Homolka: Karla Leanne Homolka (born 4 May 1970), also known as Karla Leanne Teale and Leanne Bordelais, is a Canadian serial killer who, with her first husband Paul Bernardo, raped and murdered at least three minors. She attracted worldwide media attention when she was convicted of manslaughter following a plea bargain in the 1991 and 1992 rape-murders of two Ontario teenage girls, Leslie Mahaffy and Kristen French, as well as the rape and death of her sister Tammy.
Document 6: Paul Bernardo: Paul Kenneth Bernardo (born 27 August 1964), also known as Paul Jason Teale, is a Canadian serial killer and serial rapist. He is known for several rapes in the eastern Metropolitan Toronto city of Scarborough, and a series of highly publicized sexual assaults, tortures and murders committed with his wife, Karla Homolka.
Document 7: Charles Starkweather: Charles Raymond "Charlie" Starkweather (November 24, 1938 – June 25, 1959) was an American teenaged spree killer who murdered eleven people in the states of Nebraska and Wyoming in a two-month murder spree between December 1957 and January 1958. All but one of Starkweather's victims were killed between January 21 and January 29, 1958, the date of his arrest. During the murders committed in 1958, Starkweather was accompanied by his 14-year-old girlfriend, Caril Ann Fugate.
Document 8: Elmer Wayne Henley: Elmer Wayne Henley Jr. (born May 9, 1956) is a convicted American serial killer, incarcerated in the Texas Department of Criminal Justice (TDCJ) system. Henley was convicted in 1974 for his role in a series of murders in Houston, Texas, between 1970 and 1973 in which a minimum of 28 teenage boys were abducted, tortured, raped and murdered by Dean Corll. Many of the victims were lured to Corll's home by Henley or Corll's other teenage accomplice, David Brooks. Corll was shot dead by Henley, then 17 years old, on August 8, 1973.
Document 9: Serial killer: A serial killer is typically a person who murders three or more people, usually in service of abnormal psychological gratification, with the murders taking place over more than a month and including a significant break (a "cooling off period") between them. Different authorities apply different criteria when designating serial killers; while most set a threshold of three murders, others extend it to four or lessen it to two. The Federal Bureau of Investigation (FBI), for example, defines serial killing as "a series of two or more murders, committed as separate events, usually, but not always, by one offender acting alone".
Document 10: Grim Sleeper: Grim Sleeper is the nickname for convicted serial killer Lonnie David Franklin Jr., responsible for at least ten murders and one attempted murder in Los Angeles, California. The attacker was dubbed the "Grim Sleeper" because he appeared to have taken a 14-year break from his crimes, from 1988 to 2002. In July 2010, Franklin was arrested as a suspect, and, after many delays, his trial began in February 2016. On May 5, 2016, the jury convicted him of killing nine women and one teenage girl. On June 6, 2016, the jury recommended the death sentence, and on August 10, 2016, Los Angeles Superior Court sentenced him to death for each of the ten victims named in the verdict.
Document 11: Earle Nelson: Earle Leonard Nelson, known as "the Gorilla Man," (May 12, 1897January 13, 1928) was an American serial killer.
Document 12: List of serial killers by number of victims: A serial killer is a person who murders three or more people, in two or more separate events over a period of time, for primarily psychological reasons. There are gaps of time between the killings, which may range from a few hours to many years. This list shows serial killers from the 20th century to present day by number of victims. In many cases, the exact number of victims assigned to a serial killer is not known, and even if that person is convicted of a few, there can be the possibility that he/she killed many more.
Document 13: Jeffrey Dahmer: Jeffrey Lionel Dahmer (May 21, 1960 – November 28, 1994), also known as the Milwaukee Cannibal, was an American serial killer and sex offender, who committed the rape, murder, and dismemberment of seventeen men and boys between 1978 and 1991. Many of his later murders involved necrophilia, cannibalism, and the permanent preservation of body parts—typically all or part of the skeletal structure.
Document 14: Eddie Leonski: Edward Joseph Leonski (December 12, 1917 – November 9, 1942) was an American soldier and serial killer responsible for the strangling murders of three women in Melbourne, Australia. Leonski was known as the "Brownout Strangler", given Melbourne's wartime status of keeping low lighting (not as stringent as a wartime blackout). His self-confessed motive for the killings was a twisted fascination with female voices, especially when they were singing, and his claim that he killed the women to "get at their voices."
Document 15: Eric Edgar Cooke: Eric Edgar Cooke (25 February 1931 – 26 October 1964), nicknamed the "Night Caller", was an Australian serial killer. From 1959 to 1963, he terrorised the city of Perth, Western Australia, by committing 22 violent crimes, eight of which resulted in deaths.
ground_truth: American