Combing through her social media, cops found Lecron posted frequently about the Columbine High School shooters, and glorified other mass murderers, like Roof, who killed nine people at a church in Charleston, S.C., in 2015. She even visited the Colorado school — where two students killed 13 people and then committed suicide in 1999 — in August, promising the trip would be “fun” and that she was eager to share photos.