The grad student was 28 years old.
I am 28 years old. If I saw an adult man raping a young boy I would damn well not walk away and call my father.
If someone came to me and reported someone I worked with was being inappropriate with a kid, I’d ask for specifics, too. Both grad student and coach were massively at fault there.
You are both right.
But through the eyes if a guy who was in his mid 70's at the time, I still have to give the benefit of the doubt to Joe Paterno.
My feelings are far less charitable to the 28 year old grad student who personally witnessed the outrage. Particularly a strong young football player who was certainly physically able to stop it. My feelings might be different if he was the nerdy team statistician with horn-rimmed glasses.