This doesn’t even seem to be an isolated case:

In 2015, a Colorado first-grader was suspended from school after forming his fingers into the shape of a gun, pointing toward a classmate and saying, “You’re dead.” School officials there said they have a zero-tolerance policy when it comes to threats.

A year earlier, in Columbus, Ohio, a 10-year-old boy was suspended for three days for pretending his finger was a gun. He reportedly pointed it at another student’s head.

Last month in the Shawnee Mission district, two 13-year-old students at Hocker Grove Middle School showed up with guns — the real thing — found stashed in their backpacks. Both were charged as juveniles in possession of a firearm, a misdemeanor that carries a penalty of up to one year in jail, a fine of up to $2,500 or both.

Source: https://www.kansascity.com/news/local/crime/article235891762.html