A suicide note, guns and ammunition belonging to Nashville Christian school shooter Audrey Hale were found by officers serving a search warrant at the shooter’s home, according to authorities.

The warrant also revealed that Hale’s 28th birthday was March 24, three days before the shooting.

The Metropolitan Nashville Police Department released a list of 47 items and groups of items they found belonging to Hale, including several diaries, a shotgun, cell phones and laptop computers.

Officers found folders and journals with notes about firearms courses and school shootings, according to the search warrant.

They also found a school photo and five-year-old books. from The Covenant School, where Hale was a student and shot dead six people, including three children, on March 27.

Hale had been under a doctor’s care for an undisclosed emotional disorder and hid weapons in the family home, unknown to his parents, police said.

According to officials, Hale legally purchased seven guns at five local stores and later sold one of the firearms. Three of the weapons were used in the shooting.

Last Monday, Hale shot multiple times at a door at The Covenant School and gained access to it.

Hale had planned the attack for months, according to journals police found in the shooter’s car and bedroom.

Police said the shooter, acting alone, fired 152 rounds, including 126 from a 5.56 rifle and 26 from a 9mm.

Students Evelyn Dieckhaus, Hallie Scruggs and William Kinney, all 9, were killed along with substitute teacher Cynthia Peak, 61, the school’s principal. Katherine Konce60, and janitor Mike Hill, 61.