Evanston police are investigating an incident in which students claimed a substitute teacher at Haven Middle School was watching pornographic videos at his desk while students worked on a science project.
Police Cmdr. Joseph Dugan says the school resource officer at Haven interviewed the teacher, who was cooperative and turned over his laptop to the officer.
Dugan says the teacher denied watching porn, but was watching a cable TV show "that may have had inappropriate content."
The teacher is not in custody, Dugan says, and juvenile detectives will follow up by examining the laptop and interviewing witnesses.
The school, Dugan says, has distributed a letter to parents about the incident, which was the subject of a television news report Friday night.