From the linked Luicci article from 2011:
You worked for six years under Jerry Sandusky. Did you have any inkling of what was going on?
Schiano: Because of the situation being what it is, I'm not even going to get into it. I'm so far removed. Again, you don't need people making commentaries on things like this. It's just a sad thing.
Clearly he had no intention of answering the question. I think it is reasonable to infer that at minimum, he "had an inkling".
http://www.nj.com/rutgersfootball/index.ssf/2011/11/joe_paterno_retirement_saddens.html
I do not see how you can INFER anything. It would be difficult to even guess or speculate.