An 18-year-old woman suspected of making threats to Denver-area schools was found dead on Wednesday 17th April, according to police.
Sol Pais was reportedly obsessed with the 1999 Columbine high school massacre, in which two teenagers murdered 12 students and a teacher.
The alleged threat led to school closures, affecting more than 500,000 students, and a manhunt for the woman.
She flew to Denver from her home in Florida ahead of the 20th anniversary of the Columbine shooting.
Jefferson County Sheriff Jeff Shrader told reporters on Wednesday that she died from an apparent self-inflicted gunshot wound.
The FBI earlier tweeted there was no longer a threat to the community and the suspect is deceased.