BUTTE (AP) — An investigation has revealed a former employee made more than 100 unauthorized changes to grades given to 36 former or current students, who now face potential disciplinary action, officials at Montana Tech said.

Chancellor Don Blackketter told the Montana Standard (http://bit.ly/xw8hVb) in a story published Saturday that results of the investigation will be turned over to authorities for possible criminal prosecution.

Blackketter declined to name the former employee. School officials said no faculty members were involved in alleged wrongdoing, and all transcripts have bee...