One of the 12-year-olds threatened to shoot four of his classmates, the other posted a threat on Instagram and an 11th grader threatened “Antioch part two,” according to police.

As an investigation into the deadly shooting at Antioch High School continues, more details have come to light on the shooter.

According to MNPS Spokesperson Sean Braisted, metal detectors are not standard at traditional or magnet schools in the district. The only instance they are used is at Alternative Learning Centers, ...