TOMBALL, Texas (AP) - A Texas teacher who authorities say brought a handgun to school and made threatening comments about colleagues has been arrested. Mark Davis, a history and geography teacher at Concordia Lutheran High School in Tomball, located northwest of Houston, was arrested Wednesday. He's charged with possessing a weapon in a prohibited place and threatening to exhibit or use a firearm at a school. A criminal complaint says a teacher who encountered Davis Tuesday said he “appeared to be more angry than usual.” Although Davis had a license to carry a handgun the school had posted notices prohibiting people from bringing guns onto campus.

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