Nashville shooter planned for 'months to commit mass murder at the Covenant School': Police

The motive of the 28-year-old attacker who opened fire at a Christian school last week on March 27 has still not been established, according to the Metropolitan Nashville Police Department.

The shooting perpetrated at the Covenant School in Nashville, Tennessee, left six dead, including three children and three adults.

An April 3 police press release noted that the shooter had planned the attack for months.

"In the collective writings by [the shooter] 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 press release noted.

While the investigation update said that it seems the perpetrator "acted totally alone," the press release also stated, "It is known that [the killer] considered the actions of other mass murderers." The individual's motive "has not been established and remains under investigation by the Homicide Unit in consultation with the FBI’s Behavioral Analysis Unit," the press release noted.

The perpetrator, who unloaded a whopping 152 rounds during the deadly attack, was fatally shot by law enforcement.

The shooter "fired a total of 152 rounds (126 5.56 rifle rounds and 26 nine millimeter rounds) from the time she shot her way into the school until she was killed by police," the release notes. "Officer Rex Engelbert discharged a total of four 5.56 rounds from his rifle; Officer Michael Collazo discharged a total of four rounds from his department-issued nine millimeter pistol."

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