A retired professor at UNC Chapel Hill who is serving as an adviser to a campus group was asked to resign Friday after sending an e-mail the university deemed inappropriate, WTVD-TV reported Monday.

When Professor Emeritus Elliot Cramer, who was serving as the adviser to the campus group Youth for Western Civilization, was warned by e-mail that someone was circulating fliers with his home address, he responded:

"Thanks for your concern; I have a Colt .45 and I know how to use it."

Read the e-mail

UNC Chancellor Holden Thorp asked Cramer to step down, and Cramer agreed. Thorp issued a statement after the incident.

"Professor Emeritus Elliot Cramer has been retired from the University for 15 years. When the Youth for Western Civilization, a campus student group, needed an adviser, he agreed to serve. Today, he sent an e-mail that was highly inappropriate and not consistent with the civil discourse we are trying to achieve. I asked him to step down from his role as adviser, and he will do so."

Youth for Western Civilization is a group that claims to challenge left-wing education leaders.