APPLETON, Wis. (WFRV) - Documents of an investigation into a former Xavier High School principal have been released by the Appleton Police Department after concerns were raised about inappropriate conversations with students. In November 2024, principal Mike Mauthe was placed on administrative le ave. An investigation into Mauthe began after he resigned shortly after and accepted a job at St. Mary's Catholic High School. Mauthe was Xavier's principal for roughly 12 years. Former Green Bay Packer charged for dog fighting in “largest seizure of dogs from one person” According to the incident report obtained by Local 5 through an open records request, the Superintendent of Green Bay Diocese looked into the alleged communication between Mauthe and a former student, saying, "It became apparent that the communication was excessive." The report states that over 200 documents to the student were found within a month. Some of the alleged messages from Mauthe reportedly asked the student to hang out with him instead of going to class. Appleton PD started an investigation last November after the Superintendent of Green Bay Diocese was concerned Mauthe's alleged conduct may be criminal. Police officer in Wisconsin resigns amidst investigation into alleged retail theft on duty According to Chief of Police Polly Olson of the Appleton Police Department, there was no probable cause to believe a crime was committed by Mauthe. Chief Olson provided the following statement to Local 5: On November 12, 2024, the Appleton Police Department was contacted by the Diocese of Green Bay regarding their Appleton-based Xavier High School and the school principal, Mike Mauthe.  Diocese leaders were concerned about information they discovered while investigating a personnel complaint made to them regarding Mr. Mauthe. The Diocese’s investigation centered on electronic communication Mauthe had with a former Xavier High School student. As these communications were reviewed, the Diocese was concerned about the nature of the subject matter and they contacted the Appleton Police Department. A detailed investigation was completed over the next four months, and the Appleton Police Department determined there was not probable cause to believe a crime had been committed by Mauthe and the investigation was closed. Chief Polly Olson In the report, the former student denied there was any sexual activity. Mauthe was fired after the internal investigation for violating the Diocese of Green Bay’s “Our Promise to Protect” policy. Local 5 will provide an update to this story when more information is available. ...read more read less