The FBI says proper protocol was not followed in following up on a tip
about Nikolas Cruz, the suspect in the mass shooting at a South Florida
high school on Wednesday that left 17 people dead. A law enforcement
source told ABC News that investigators believe approximately 150 shots
were fired in the incident.

A person close to Cruz called an FBI tip line on Jan. 5 with information
about Cruz's desire to kill people, erratic behavior, disturbing social
media posts, as well as the potential of him conducting a school
shooting, according to an FBI statement.

“We have determined that these protocols were not followed for the
information received by the PAL on January 5. The information was not
provided to the Miami field office, and no further investigation was
conducted at that time,” the FBI said in a statement Friday.