A teacher in Newtown Connecticut, the site of one of the deadliest school shootings in American history, was arrested Wednesday after allegedly bringing a gun to the middle school where he worked.

Jason M. Adams, a teacher at Newtown Middle School, was carrying a gun for which he had a permit when police arrested him inside the school. He faces a felony charge of possession of a weapon on school grounds.

As The Hartford Courant points out, none of the Newtown schools were open to students when the arrest occurred.

In the 2012 shooting at Sandy Hook Elementary, a campus in the Newtown School district, 26 people, including 20 schoolchildren, were killed. Families of the victims have been outspoken proponents for stricter gun laws in Connecticut and across the U.S.