Investigators recovered a suicide note and further evidence during a search of Nashville school shooter Audrey Hale’s home, according to a court document.

Metro Nashville police officers scouring the 28-year-old transgender shooter’s home on the day of the killings discovered the fir, ammunition and a shotgun among 47 items, according to an inventory of the seized property.

Also recovered from the property — which Hale shared with her parents — were more journals, cellphones and laptops, according to the document, which was obtained by The Post.

The revelation comes one day after police revealed that Hale had “considered the actions of other mass murderers” and had left behind a trove of writings.

“In the collective writings by Hale found in her vehicle in the school parking lot, and others later found in the bedroom of her home, she documented, in journals, her planning over a period of months to commit mass murder at the Covenant School,” the Metro Nashville Police Department said Monday.

Metro Nashville Police Chief John Drake previously said police searched Hale’s family’s home and her vehicle, which was left at the scene. 

He said investigators recovered a manifesto and detailed maps pertaining to Hale’s killing spree. 

Hale, 28, killed three children and three staffers in the March 27 attack at the Covenant private elementary school.

Her parents, Ron and Norma, previously said they did not approve of guns and had thought their daughter had sold her weapons. Along with the three weapons she used in the attack, another four guns were found during the search of the house last week.

Hale unleashed 152 bullets before she was killed and also left behind a manifesto.

Police previously said Hale had targeted the school, though not the specific victims. Hale also “explored” other locations, including two public schools, before carrying out the Covenant killing spree, officials have previously said.

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Surveillance footage from the exterior of the school showed Hale shooting into the school’s locked side doors and crawling in through the shattered glass.

Hale was then seen stalking through the empty halls of the school as 911 calls poured in.

Police body camera footage shows the team of MNPD officers rushing into the building and confronting the shooter within minutes.

Officers Rex Engelbert and Michael Collazo each fired four rounds, ultimately killing Hale, police said.

Nine-year-olds Evelyn Dieckhaus, Hallie Scruggs and William Kinney were killed in the assault, as well as school janitor Mike Hill, substitute teacher Cynthia Peak and headmistress Katherine Koonce, who reportedly ran toward the shooter to try to protect the school.

A local official told The Post that the FBI’s Behavioral Analysis Unit is reviewing Hale’s manifesto. Police are still investigating Hale’s possible motive.