The FBI may be sitting on what has been described as the Nashville school shooter’s “manifesto” because bone-chilling information within it could pose a continuing threat to the public, a Tennessee official said Thursday.

The killer behind the March 27 massacre that left three nine-year-old kids and three adults dead inside a Christian school was a 28-year-old woman who claimed to be a man. She fired 152 bullets in a 14-minute rampage inside The Covenant School, a private Presbyterian school, before police stormed inside and shot her dead. While the Metro Nashville Police Department is heading up the probe with assistance from the FBI, MNPD spokesman Don Aaron said material related to the shooter is still “under analysis” by the bureau.

See Also:

UK denies it’s in talks with Turkey over submarine construction, despite Erdogan comments

“What I was told is, her manifesto was a blueprint on total destruction, and it was so, so detailed at the level of what she had planned,” Metro Nashville Council Member Courtney Johnston told The New York Post, adding she had been informed the FBI would not release the entire manifesto.

Read more: Daily Wire