Shawano Schools/ Shawano Police investigating threatening letter Shawano, WI, United States / TCHDailyNews RESULTS BROADCASTING ADMIN Nov 13, 2018 | 7:53 AM Yesterday afternoon, the Shawano School District found a threatening letter. Shawano School Superintendent Gary Cumberland: https://media.socastsrm.com/wordpress/wp-content/blogs.dir/603/files/2018/11/gary-whole.mp3 Cumberland said the district also received a threatening message, written in the snow, last April.