STAMFORD - A substitute teacher is facing charges after police say he was masturbating in a school.

Stamford police were called to Westhill High School and arrested Michael Luecke, 72, Wednesday. 

The incident was captured by surveillance cameras. Police are not releasing the video, but say it clearly shows what he was doing. 

Some students say the teacher was familiar to them and had been in the building before. Luecke was covering a music class Wednesday.