Roy Den Hollander, who was found dead after allegedly killing Justice Esther Salas' son and wounding her husband, is also suspected of shooting and killing lawyer Marc Angelucci earlier this month.

Roy Den Hollander was behind several unsuccessful lawsuits against bars that promoted "ladies' night" events and universities offering women's studies courses.

Police say that under a pseudonym, Rochefort published several blog posts that defended the École Polytechnique killer Marc Lépine, who took the lives of 14 young women in the 1989 massacre.