Two Higley High School students made statements they planned to "shoot up" Higley High School before as many as 20 students during lunch Friday, Superintendent Larry Likes said during a morning press conference.
Two of the students who listened at the gathering reported what they heard to counselors Monday morning, causing a ripple effect that ended in two schools going into lockdown early Monday.
"Yesterday, two students walked into the counseling office and reported what they had seen, that they had overheard two students plotting to shoot other students," Likes said. "These two thought about it over the weekend, and even though they didn't think they would do it, decided they should tell."
One student, Joshua Wildermuth, 16, was detained immediately at the school, but a second, John Hull, 15, was out of school on Monday. Hull was detained late Monday by police, and both boys are being held at Maricopa County Juvenile Detention Facility.
Police and school administrators say today was the intended date of the alleged attack on the school, causing a decline in enrollment for the day as some students stayed home.
"The concern is very real among students, staff, administrators and parents," Likes said. San Tan Elementary School joined Higley High School in going into lockdown Monday because roughly a week ago a parent had found threatening graffiti outside the school alleging that people "would suffer" within a week, Likes said.