Investigators say the alleged ringleader had exchanged instant messages with a DeLand Middle School classmate, saying: "I will kill every person I see. ... Everyone will pay for what they did to me."
Authorities say the student, who claimed he was being teased and picked on by other students, threatened to lock the cafeteria doors during lunch and shoot everyone in sight.
The classmate was so disturbed, she sent the messages to a family member, who contacted the sheriff's office.