In the aftermath of the killing of George Floyd and the protests that have swept the nation, some college administrators are acting quickly when it comes to professors' provocative or offensive posts on social media. In some cases, however, administrators' hands are tied.. Last week Scott Senjo, a professor of criminal justice at Weber State University, posted three threatening tweets about people protesting against police brutality. The institution quickly started an investigation; Senjo said on Wednesday that he had agreed to its request that he step down, The Salt Lake Tribune reports. At Miami University, in Ohio, Douglas Brooks, a retired professor teaching a summer course, was accused of making offensive comments to protesters. In a letter from the provost to faculty members, the university condemned his views but said his speech is protected by the First Amendment. Still, Miami is giving students the option to finish the course with a different professor, The Cincinnati Enquirer reported.