Federal officials are delaying the release of a manifesto written by Audrey Hale, who killed six people in a Nashville Christian school, according to local officials, with one calling it “astronomically dangerous.”

Rep. Tim Burchett (R-Tenn.) told the New York Post this week that the FBI is currently behind the delay. He said that the documents should be made public for grieving family members and for members of Congress.

Hale, who was born female, used “he/him” pronouns, and police officials previously told a news conference she identified as transgender. Later, Nashville Police Chief John Drake said Hale suffered from mental health issues and was under the care of a doctor, while her parents did not know she had procured several firearms.