Washington teacher attacked, found with zip-tie around neck

Police Sgt. Ken Seuberlich said detectives are still searching for clues at Bothell High School, about 12 miles northeast of Seattle, hoping to watch some useful surveillance video.

In a letter to parents and staff, Francois called this an "alarming — highly unusual — situation" and said school officials would do whatever they can to make students and staff feel safe at the high school on Monday.

Police have a school resource officer posted at the high school and Seuberlich said they were going to add more security to ensure the safety of students and staff until the attacker is found.