Somehow Misfired?

Sources say he was in a classroom for a demonstration of how to break down and clean his service weapon. They say an experienced state police firearms instructor was handling a gun that somehow misfired.

There is so much fail hidden in those two sentences, but I sorta suspect it boils down to a rule two violation and testing a recently reassembled weapon with a chambered round.

When you're teaching your students to break 'em down and put them back together maybe the best place for live ammo for both students and instructors is someplace other than the classroom. Just saying...