Geometry teacher used Obama assassination to teach angles

An Alabama teacher used assassinating Barack Obama as a way to teach angles to his geometry students.

Someone alerted authorities and the math teacher was questioned by the Secret Service but was not taken into custody or charged with any crime.

"We did not find a credible threat," said Roy Sexton, special agent in charge of Birmingham's Secret Service office. "As far as the Secret Service is concerned, we looked into it, we talked to the gentleman and we have closed our investigation."

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