Schools were closed Monday in Casper, Wyoming because of an online threat of mass violence. That threat was traced to Oklahoma. The FBI says 34-year-old Glenn Allen Kirkham of Oklahoma City has been arrested. According to a Complaint Affidavit filed in U.S. District Court for the Western District of Oklahoma, he is charged with making a threatening post on an internet-based bulletin board site early in the morning on January 14th. The threat was made to Casper, Wyoming claiming a planned attack within 1-2 hours using small caliber handguns and other weapons. The Casper, Wyoming police department received numerous calls regarding the complaint. The investigation identified Kirkham as the originator of the threatening post and he was arrested by agents of the Oklahoma City FBI at approximately 5:20 p.m. on January 14th.