Question: What country was Gilles Tetreault's intended murderer from?

full_context: Document 1: Michael C. Hall: Michael Carlyle Hall (born February 1, 1971) is an American actor, known for his roles as Dexter Morgan, a serial killer and blood spatter analyst, in the Showtime TV Network series "Dexter", and as David Fisher in the HBO drama series "Six Feet Under". In 2010, Hall won a Golden Globe Award and a Screen Actors Guild Award for his role in "Dexter".
Document 2: Red John: Red John is a fictional character and the primary antagonist of the CBS crime drama "The Mentalist" for the first five seasons and half of the sixth. As a serial killer, he is believed to have begun his killing spree in 1988, and has, with his operatives and acolytes, killed more than 70 people in California, Nevada, and Mexico, throughout his murder spree. Five years prior to the action of the first episode, he murdered the wife and the daughter of Patrick Jane (Simon Baker), making Jane his dedicated nemesis.
Document 3: 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 4: Dexter (episode): "Dexter", or "Pilot", is the pilot episode of the first season television drama series "Dexter", which premiered on October 1, 2006 on Showtime in the United States. The episode was written by developer James Manos, Jr. and directed by Michael Cuesta. It was based on the opening of the novel "Darkly Dreaming Dexter" by Jeff Lindsay. The pilot introduces the series' protagonist, Dexter Morgan (Michael C. Hall), a Miami Metro Police Department blood spatter analyst with a double life as a serial killer. While solving murders in the Homicide division, Dexter also spends his time hunting and killing murderers and criminals who have escaped the justice system. The pilot introduces the "Ice Truck Killer", a serial killer who targets prostitutes and leaves their bodies dismembered and bloodless, and the rivalry that develops between the killer and Dexter.
Document 5: Seeing Red (Dexter): "Seeing Red" is the tenth episode of the first season of the American television drama series "Dexter", which first aired on December 3, 2006 on Showtime in the United States. The episode was written by Kevin R. Maynard and was directed by Michael Cuesta. In the episode, the Miami Metro Homicide Department team investigate a blood-soaked crime scene, where blood spatter analyst Dexter Morgan (Michael C. Hall) is confronted by a repressed memory of a traumatic incident from his childhood. Meanwhile, Dexter's girlfriend Rita Bennett (Julie Benz) is charged with assaulting her ex-husband Paul Bennett (Mark Pellegrino) and risks losing custody of their children, while Det. Angel Batista (David Zayas) investigates a hunch that the Ice Truck Killer has an amputee fetish.
Document 6: The British Invasion (Dexter): "The British Invasion" is the twelfth episode and finale of the second season, and twenty-fourth overall episode, of the American television drama series "Dexter", which first aired on 16 December 2007 on Showtime in the United States. The episode was written by Daniel Cerone (based on a story by Cerone and Melissa Rosenberg) and was directed by Steve Shill. In the episode, Lila Tournay (Jaime Murray) finds Sgt. James Doakes (Erik King) imprisoned in an Everglades cabin and learns from him that her object of affection, Dexter Morgan (Michael C. Hall), is the serial killer known as the "Bay Harbor Butcher". She decides to help Dexter and kills Doakes by setting the cabin on fire. Meanwhile, Dexter's sister Debra (Jennifer Carpenter) questions whether her career is more important than her relationship with FBI Special Agent Frank Lundy (Keith Carradine).
Document 7: Gilles Tetreault: Gilles Tetreault is the original intended target of convicted murderer, Mark Twitchell.
Document 8: Tyrone Werts: Tyrone Werts is an American man who was convicted of a second-degree murder committed in 1975, for which he received a life sentence; however, he was released after 36 years instead. This was an extremely rare case as the law in Pennsylvania says that if you have been charged with 1st or 2nd degree murder and were given a life sentence, there is no possibility for parole (Gottschalk). He is most known as an ex-convict who was released from Prison after serving 36 years of what was supposed to be a life sentence. While serving his time at Graterford Prison, in Perkiomen, Pennsylvania, Werts served as the president of the “Lifers” and made many very influential and positive changes in the prison community.
Document 9: Murder of Ken Tillery: Ken Tillery of Jasper, Texas, was murdered on January 19, 2002. On the night of his murder, Tillery, a white man, was outside of a suspected crackhouse when he was approached by three black males, Darrell Gilbert, Blake Little, and Anthony Holmes, and offered a ride in their vehicle, an early 1980s model Oldsmobile Cutlass. Tillery accepted, but an argument later developed over the gas money he agreed to pay. Tillery expected to pay only $5, but the men demanded $50. When the car passed Tillery's home and arrived at a gas station, he jumped out and tried to flee, but was caught and beaten by the three men. Tillery's attackers ran him over.
Document 10: Love American Style (Dexter): "Love American Style" is the fifth episode of the first season of the American television drama series "Dexter", which first aired on October 29, 2006 on Showtime in the United States. The episode was written by Melissa Rosenberg and was directed by Robert Lieberman. In the episode, Dexter Morgan (Michael C. Hall) hunts down Jorge Castillo (José Zúñiga), a human trafficker and murderer. His sister, Ofr. Debra Morgan (Jennifer Carpenter), attempts to extract information from a security guard whose limbs were amputated by the "Ice Truck Killer".
Document 11: Mark Twitchell: Mark Andrew Twitchell (born July 4, 1979) is a Canadian convicted of first degree murder in 2011 for killing John Brian "Johnny" Altinger. His trial attracted substantial media attention because he was inspired by the Dexter Morgan character, featured in Jeff Lindsay novels and the "Dexter" television series, a serial killer who works as a forensic bloodstain pattern analyst for the fictional Miami Metro Police Department.
Document 12: Dexter's Final Cut: Dexter's Final Cut is the seventh novel written by Jeff Lindsay, and the seventh book in the 'Dexter Morgan' book series about a serial killer who targets other serial killers. The book was released on September 17, 2013. Responding to the lack of alliteration on the title in comparison to the previous ones in the series, Lindsay has stated, "It's because this novel is very different than the previous, shockingly so..."
Document 13: The One Who Got Away: The One Who Got Away: Escape from the Kill Room (CreateSpace Independent Publishing Platform, ISBN  ) is a non-fiction book by first time author Gilles Tetreault. The book is a true crime novel based on true events.
Document 14: John Giuca: John Giuca (born October 1983) is an American man who was convicted on a charge of second-degree felony murder in the death of 19-year-old Mark Fisher in October, 2003. Giuca was arrested a year after the murder, he was found guilty along with trigger-man Antonio Russo; both were given a sentence of 25 years to life.
Document 15: Thomas Principe: Thomas Principe, also known as the ".22 Caliber Killer", was an Italian-American Gambino crime family street soldier and close friend of John Gotti from New York City Alleged to have been part of a special hit squad that would order executions with silencer-equipped .22 caliber pistols, earning them the title in the newspapers as "the .22 Caliber hitters". alleged members considered to make up the team of executioners were thought by the Federal Bureau of Investigation (FBI) to be Vincent Gigante, John DiGilio, Salvatore Briguglio and Tommy. The team of "hitters" were suspected of being responsible for at least twenty gangland executions since 1976, including six FBI informants and potential witnesses. The most publicized murder, claimed to have been the team's 21st victim was former Manhattan assistant District Attorney Gino Gallina. Gallina had become a lawyer, defending major crime figures including East Coast Genovese crime family members. He was gunned down in gangland style on a Greenwich Village street. Seven bullets riddled Gallina and he died ninety minutes later. At the time, Gallina was a key witness before a Newark, New Jersey grand jury, testifying, among other things, on Mafia executions performed by the suspected ".22 Caliber Hitters". He was claimed a victim of the team of executioners even though the bullets that killed him were from a .38-caliber handgun. Federal officials blamed his slaying on a leak from the grand jury.
ground_truth: Canadian