Why are all of the mass shooters men?

[Crabby Appleton]

19. Laurie Dann

more at:
https://en.wikipedia.org/wiki/Laurie_Dann

During the days before May 20, 1988, Laurie Dann prepared rice cereal snacks and juice boxes poisoned with the diluted arsenic she had stolen in Madison. She mailed them to a former female friend, ex-babysitting clients, her psychiatrist, Russell Dann, and others. In the early morning of May 20, she personally delivered snacks and juice "samples" to other friends, acquaintances, and families for whom she had babysat, some of whom had not seen her for years.[1][2] Other snacks were delivered to Alpha Tau Omega, Psi Upsilon, and Kappa Sigma fraternity houses and Leverone Hall at Northwestern University in Evanston.[1][2] Notes were attached to some of the deliveries.[6][7][8] The drinks were often leaking and the squares unpleasant tasting, so few were actually consumed. In addition, the arsenic was highly diluted so nobody became seriously ill.[1]

At about 9:00 a.m. on the 20th, Dann arrived at the home of the Rushe family, former babysitting clients in Winnetka, Illinois, to pick up their two youngest children. The family had just told Dann they were moving away.[2] Instead of taking the children on the promised outing, she took them to Ravinia Elementary School in Highland Park, Illinois, where she erroneously believed that both of her former sister-in-law's two sons were enrolled (in fact, one of Dann's intended targets was not even a student at the school). She left the two children in the car while she entered the school and tried to detonate a fire bomb in one of the school's hallways. After Dann's departure, the small fire she set was subsequently discovered by students, and quickly extinguished by a teacher. She drove to a local daycare attended by her ex-sister-in-law's daughter and tried to enter the building with a plastic can of gasoline, but was stopped by staff.

Next Dann drove the children back to their home and offered them some arsenic-poisoned milk, but the boys spat it out because it tasted strange to them. Once at their home, she lured them downstairs and used gasoline to set fire to the house, trapping their mother and the two children in the basement (they managed to escape).[1][2][9] She drove three and a half blocks to the Hubbard Woods Elementary School with three handguns in her possession. She wandered into a second grade classroom for a short while, then left. Finding a boy in the corridor, Dann pushed him into the boys' washroom and shot him with a .22 semi-automatic Beretta pistol. Her Smith & Wesson .357 Magnum revolver jammed when she tried to fire it at two other boys, and she threw it into the trash along with the spare ammunition. The boys ran out of the washroom and raised the alarm.[1] Dann then re-entered the second grade classroom where students were working in groups on a bicycle safety test. She ordered all the children into the corner of the room. The teacher refused and attempted to disarm Dann, managing to unload the Beretta in the struggle. Dann drew a .32 Smith & Wesson from the waistband of her shorts and aimed it at several groups of the students. She shot five children, killing eight-year-old Nicholas Corwin and wounding two girls and two boys before fleeing in her car.[2]