Student found dead in classroom

It was a regular Friday, until a student was found dead in his classroom.After they found him dead they questioned some other classmates of his and they all said that he had gone back to the classroom to do some work he had missed. But something did not add up, they questioned the teacher and she said,Why yes he did come back to the classroom to do extra work, but that was all. They knew the teacher was lying because they inspected his body and they found bruises and cuts all over his body. They knew the teacher did it because she was the only one in the classroom at the time. The next day the teacher was arrested for the murder of Joshua Thompson.