(CNN) — A teenage boy had a plan.
According to authorities in Waseca, Minnesota, John David LaDue, 17, was going to kill his family, start a diversionary fire, set off bombs at an area school, kill the resource officer there and then shoot students.
Thanks to a woman who reported suspicious activity at a storage facility a tragedy has been averted.
Police were tipped off to the case two days earlier. Chelsie Shellhas called them about someone acting suspiciously at a storage facility.
“He shut the door, and I thought it looked funny,” she told CNN affiliate WCCO. “Because, normally, we see people come here, and it doesn’t take them 10 minutes to open a storage shed, so that’s why I called it in.”