The suspect in Monday's deadly school shooting was a former student who had maps of The Covenant School, Nashville Police Chief John Drake said.
Audrey Hale, 28, who police said was a transgender woman, had conducted surveillance and prepared for the attack with detailed maps, officials said. Police said the shooter had a manifesto, the contents of which were not released.
Hale had attended the school as a child but police did not detail which grades.
Hale shot through a door to gain access to the school, Drake said.