NASHVILLE, Tenn.--The 28-year-old female who heinously murdered three 9-year-olds and three revered adults at The Covenant School in Green Hills also targeted other locations.

Metro Nashville Police Department (MNPD) Chief John Drake on Tuesday spoke with media, revealing the Federal Bureau of Investigation (FBI) and MNPD are combing through a manifesto and writings left behind by shooter Audrey Hale.

Chief Drake had previously stated investigators had discovered other locations targeted by Hale, but on Tuesday he stated Hale had detailed drawings of The Covenant School and an "other school." Before Tuesday, Chief Drake had stated security factors at the other "location" could have kept it from being targeted.

MNPD spokesperson Kristin Mumford told FOX 17 police will not expand any further on the "other school" due to the investigation. Chief Drake has stated repeatedly Hale had detailed drawings and writings of the assaults that would take place.

Many questions remain in the investigation, including a motive, which police have yet to identify. Hale was a former student at the school and police stated she was a "biological female" who identified as transgender. Markings made by Hale on one of the rifles also made references to the name "Aiden," which was used on Hale's social media sites.

What is known, is Hale was receiving treatment for an emotional disorder according to police and had legally purchased 7 weapons from 5 local gun retailers in recent years. Hale's parents told police they didn't believe Hale should have a weapon and believed she had sold the only one in her possession, but Hale had hidden the other weapons from them.