Six months before Tuesday's fatal shooting at a Colorado school, a district official urged the school's administration to investigate allegations that an anonymous parent feared could lead to "a repeat of Columbine." https://t.co/tLYNxhAbLc

Six months before Tuesday's fatal shooting at a Colorado school, a district official urged the school's administration to investigate allegations that an anonymous parent feared could lead to "a repeat of Columbine." https://t.co/tLYNxhAbLc (via Twitter http://twitter.com/CNN/status/1126415329423499265)