The 18-year-old woman who traveled to Colorado from Miami and made a "credible threat" against at least 20 schools, including Columbine High School, has been found dead, authorities said. The woman, identified by law enforcement as Sol Pais, died of an apparent self-inflicted gunshot wound. Authorities described her as being "infatuated" with the 1999 mass shooting at Columbine, which left 13 people dead and 24 wounded, and said she was "armed and extremely dangerous." Saturday is the 20th anniversary of the massacre, and Jefferson County Public Schools has reported a surge in threatening email and telephone messages.

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