Addressing reporters about the ritual slaying of six cheerleaders at a Frankfort, KY, high school, FBI director Robert Mueller clarified that the body count does not seem high enough to qualify as 'mass' murder. 'I don't know if there's an official minimum, but I always imagined 'mass' was more like 15 or 20,' Mueller said. 'Charles Whitman, now there was a mass murderer.' Mueller added that in spite of their modest scale, the killings 'were still pretty bad.' 