Teotihuacán Pyramids Shooting: Gunman Carried Notes on U.S. Mass Shootings

The man who killed one tourist at a Mexican pyramid and wounded several others had materials in his backpack tied to a 1999 U.S. attack, a possible reference to the Columbine High School massacre....

The man who killed one tourist at a Mexican pyramid and wounded several others had materials in his backpack tied to a 1999 U.S.

attack, a possible reference to the Columbine High School massacre.