Question: What Canadian mass murderer from Montreal, Quebec committed suicide after the mass murder?
École Polytechnique massacre:  Overall, he killed fourteen women and injured ten other women and four men in just under 20 minutes before turning the gun on himself. 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".
Marc Lépine