Colorado: University Of Colorado Denver

A state senator's after-hours security code for the Capitol has been deactivated after he made it available to a class he was teaching.

Sen. Shawn Mitchell, R-Broomfield, said he had no idea he was breaching security when he provided his individual code to the 11 graduate students in his Colorado government and politics class at the University of Colorado Denver.

Mitchell might own the distinction of being the only lawmaker to ever be "deactivated."

"It's never happened to a lawmaker in anyone's memory, but it has happened to other statehouse employees," said Lance Clem, spokesman for the Department of Public Safety.

The code — a series of numbers — allows lawmakers, staffers and others to get into the state Capitol after hours.