The fbi had the Las Vegas shooter on sights, the Florida High School shooter on their sights, ther gay night club shooter, was in their sights, the Boston bombers were on the watch list, of the fbi, I mean, all these mass shooting suspects, seemed to have been on the fbi's watch list, to the point, they are fully aware of the person in interest, but only after they commit their crimes, that the fbi seems to be aware of.