FBI Director Christopher Wray attends the International Conference on Cyber Security on Jan. 9. The FBI says that someone called its tip line to report concerns about Nikolas Cruz, who has told police he killed 17 people in Parkland, Fla. But the bureau failed to follow protocols to assess the threat.

FBI Director Christopher Wray attends the International Conference on Cyber Security on Jan. 9. The FBI says that someone called its tip line to report concerns about Nikolas Cruz, who has told police he killed 17 people in Parkland, Fla. But the bureau failed to follow protocols to assess the threat.