District urged school to investigate concerns it could become the next ‘Columbine’ months before Tuesday’s fatal shooting

(CNN)Five months before Tuesday’s fatal shooting at a Colorado charter school, a district official urged the school’s administration to investigate allegations of violence, sexual assault and campus bullying that an anonymous parent feared could lead to “a repeat of Columbine,” according to a school district letter obtained by CNN. “The concerns expressed by this individual are very serious and need to be looked into to the extent possible. Please keep (the district) apprised of your investigation and conclusions,” wrote Winsor, the district’s director of choice programming. In a February letter to parents, Penelope Eucker, the executive director of STEM, the K-12 charter school where one student was killed and eight others were injured on Tuesday, disputed many of the anonymous …