Students were not in the building Wednesday at Newtown Middle School when someone spotted a teacher carrying a gun.
That teacher, Jason Adams, 46, has since been arrested, and the community is wondering what he was thinking when he brought the firearm to work that day, the Hartford Courant reported.
So far, his intentions are not clear.
Little is known about the teacher, and he didn't respond to calls from media requesting comment on Wednesday's incident. He teaches science and was described by one parent as "kind, helpful, considerate," according to NBC Connecticut. Parent Liz O'Connell was shocked that he was arrested.
"I think it's horrible, obviously I don't know the reason why but it was a stupid mistake."