Question: Question: What Canadian mass murderer from Montreal, Quebec committed suicide after the mass murder?

Context paragraphs:
Günter Hermann Ewen: Günter Hermann Ewen (1962 – May 18, 1999) was a German mass murderer who killed four people and wounded at least nine others in Dillingen, Germany on May 16, 1999, before escaping to Sierck-les-Bains, France, where he killed another person, and wounded two more.  Hunted by German and French police, he eventually committed suicide in a hotel in Strassen, Luxembourg on May 18.

Andrew Kehoe: Andrew Philip Kehoe (February 1, 1872 – May 18, 1927) was an American farmer and treasurer of his township school board, notable as a mass murderer for killing his wife and 43 other people (including 38 children), and injuring 58 people by setting off bombs in the Bath School disaster on May 18, 1927.  He committed suicide near the school by detonating dynamite in his truck, causing an explosion which killed several other people and wounded more.  He had earlier set off incendiary devices in his house and farm, destroying all the buildings, as well as killing two horses and other animals.

Mass murder: Mass murder (sometimes interchangeable with "mass destruction") is the act of murdering a number of people, typically simultaneously or over a relatively short period of time and in close geographic proximity.  The FBI defines mass murder as murdering four or more persons during an event with no "cooling-off period" between the murders.  A mass murder typically occurs in a single location where one or more people kill several others.  Many acts of mass murder end with the perpetrator(s) dying by suicide or suicide by cop.

Marc Lépine: Marc Lépine (] ; born Gamil Rodrigue Liass Gharbi; October 26, 1964 – December 6, 1989) was a Canadian mass murderer from Montreal, Quebec, who in 1989 murdered 14 women, and wounded 10 women and four men at the École Polytechnique, an engineering school affiliated with the Université de Montréal, in the École Polytechnique massacre, also known as the "Montreal Massacre".

Mass media in Canada: The term mass media refers to any means or technology used to communicate a message to large groups of people.  Popular forms of mass media include television, the Internet, and newspapers.  Mass media are specifically intended to reach larger audiences.  The term is often divided into two broad categories: that of electronic mass media and that of print mass media.  Electronic mass media require their audiences to interact with electronics in order to receive the message.  They attempt to recreate or represent a message through moving pictures and/or sound.  Four common examples of electronic media used in Canadian society are television, radio, films, and the Internet.  Print mass media, on the other hand, refers to any media that is distributed to audiences in a printed form, on paper.  Examples of this include newspapers, printed books, and magazines.  The mass media model in Canada is different from the mass media model of the United States as well as the rest of the world.  According to John A. Irving, mass media functions differently in Canadian society because of a lack of collective identity; this is in reference to Canada's languages (and related cultures) as well as its proximity to the United States.  Irving states that such cultural dualism means that only some of the population responds to the mass media in English, while the other portion remain uninfluenced by English-based media.  In terms of the proximity to the United States, he explains that "most of the difficulties that threaten the mass media in Canada are the direct outcome of American economic and cultural imperialism."  Because of the United States' overwhelming influence on Canadian mass media, Canada has not been able to form its own identity in the media.  These two factors have slowed down the process of the creation of a Canadian community.  Mass media help in forming a community through communication.  When a large group of people is in communication with one another through media, an identifiable culture is formed.  Individuals in dialectic experience a sense of membership and collective identity.

Albert Guay: Joseph-Albert Guay (23 September 1918 – 12 January 1951) was a Canadian mass murderer, who on 9 September 1949, killed 23 people aboard Canadian Pacific Air Lines Flight 108 near Sault-au-Cochon, Quebec using a dynamite time bomb.  Guay planted the bomb in his wife's suitcase, the intended victim, to bypass a divorce, obtain life insurance money, and elope with his mistress.

École Polytechnique massacre: The École Polytechnique massacre, also known as the Montreal massacre, occurred on December 6, 1989, at the École Polytechnique in Montreal, Quebec, Canada.  Twenty-five-year-old Marc Lépine, armed with a Mini-14 rifle and a hunting knife, shot 28 people, killing 14 women, before committing suicide.  He began his attack by entering a classroom at the university, where he separated the male and female students.  After claiming that he was "fighting feminism" and calling the women "a bunch of feminists," he shot all nine women in the room, killing six.  He then moved through corridors, the cafeteria, and another classroom, specifically targeting women to shoot.  Overall, he killed fourteen women and injured ten other women and four men in just under 20 minutes before turning the gun on himself.  His suicide note claimed political motives and blamed feminists for ruining his life.  The note included a list of 19 Quebec women whom Lépine considered to be feminists and apparently wished to kill.

Shell Lake murders: The Shell Lake murders is the name of a single mass murder incident committed by Victor Ernest Hoffman (b. 1946, died May 21, 2004) in Shell Lake, Saskatchewan, Canada, during the early morning of August 15, 1967.  Nine people, all members of James Peterson's family, were shot in the head by a man who was later called "Canada's worst random mass murderer".

Seung-Hui Cho: Seung-Hui Cho (in Korean, properly Cho Seung-Hui; January 18, 1984 – April 16, 2007) was a South Korean spree killer and mass murderer who killed 32 people and wounded 17 others armed with two semi-automatic pistols on April 16, 2007, at the Virginia Polytechnic Institute and State University in Blacksburg, Virginia.  An additional six people were injured jumping from windows to escape.  He was a senior-level undergraduate student at the university.  The shooting rampage came to be known as the Virginia Tech shooting.  Cho committed suicide after police breached the doors of the building where most of the shooting had taken place.  His body is buried in Fairfax, Virginia.

Robert Raymond Cook: Robert Raymond Cook (July 15, 1937 - November 14, 1960) was a Canadian mass murderer, convicted for the killing of his father Raymond Cook in Stettler, Alberta, in June 1959.  Cook murdered his family, including his father, step-mother, and five half-siblings at their home in Stettler, but was only charged for his father's murder, for which he convicted and sentenced to death.

Supporting paragraphs: École Polytechnique massacre Marc Lépine
Answer: Marc Lépine