The internal documents indicate school police lacked an adequate plan to handle the Dec. 15 incident.
At the time, superintendent Ramon Cortines, who was near retirement and had turned over his duties to second-in-command, Michelle King, was not notified of the threat until about seven hours after the threat was made. As a result, Cortines made an instant decision to shut down the schools.
According to LAPD Chief Charlie Beck, the email was very specific to LAUSD campuses and it threatened violence. He said the email's "implied threat" involved explosive devices and the "specific threat" was a shooting attack using "assault rifles" and "machine pistols."
He added the email was routed through Germany but police believe its origin was much closer. No arrests have been made in the incident.
The threat, which was also received in New York City, turned out to be a hoax. It caused 1,500 schools to be closed for the day. The campuses in New York, however, remained open.
The district-wide closure cost $29 million in state funding.
School administrators said they've taken a number of steps in response to the shutdown. District officials said they will continue to err on the side of caution when there is a perceived threat to students and staff safety.
The LAUSD is the nation's second largest school district. The district includes 640,000 students in kindergarten through 12th grade and more than 900 schools and 187 public charter schools.
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