There was a weekly quiz in a TA discussion section I led today. During the quiz I was writing things I planned to talk on the board and didn't pay attention to students.
Then one student suddenly said to public "Frank, we're not allow to use note in the quiz right? These(point to a region that contains 2-3 people) people are using notes."
I looked back and confirm with that students about where she points to, but the people she accused cheating(if accurate) already put away the notes so I got no direct evidence.
Should I do anything in this scenario?
Quiz only worth 0~2%(0% if it's lowest quiz grade, 2% if not) of overall grade if that matters.
Update: The case was also reported to the Professor today and according to Professor's email it looks like the case is more serious than I expected and I'll have to explore a little more. Thanks for all responses so far.