This doesnt "highlight" dirty play per your request, but I think this article points out that Suh didnt make a sudden change to a dirty player in the NFL
https://profootballtalk.nbcsports.com/2011/11/25/ndamukong-suh-out-of-control-college-teammate-says/
Again, I am going off total play. Suh played with such a tremendous motor it would be hard for him not to step over the line.
I dont want to de-rail this subject into about whether or not Suh was dirty at Nebraska. He has proven throughout his NFL career he is a dirty NFL player. Multiple fines have proven that. I tend to think he just never got busted doing that at Nebraska or wasnt as obvious.