Obscene, violent and inappropriate content being shared in a Teams Classroom

Hello all,

My daughter (16) is reporting that some classmate posted a violent and graphic video in their classroom MS Teams environment. This was literally a non-edited video of a woman being beheaded!! Clearly this was unwelcome, unasked for and wholly intentional. 

I don't know much about Teams, but I'd very much like to follow up with local authorities, so my question here is:  Can that video be traced back to the poster? Is there a log I can get the police and the schoolboard to review?