Exoneration implies a presumption of guilt, whereas the default should be a presumption of innocence, especially in a scenario where no concrete evidence can be

Exoneration implies a presumption of guilt, whereas the default should be a presumption of innocence, especially in a scenario where no concrete evidence can be furnished. The professor has undoubtedly caused a great deal of stress and anxiety for a number of students who may or may not have cheated, and did so in an unprofessional way. They should, of course, be fired or censured in some manner for this.