Your problem is that he wasn't cross examined. Joe stated, repeatedly, that MMQ gave him ambiguous information (MMQ stated this too). So Joe says something like "of a sexual nature...I am not sure what you'd call it" which is exactly how you'd describe ambiguity. Regardless, Joe reported it to his boss and the guy in charge of campus police...who both reported to the president. Finally, he asked MMQ if he was OK with things, on several occasions. Unless you expected Paterno to go all Clouseau, which would have been against the law, he did what he could do.
First of all, let's assume Mike McQueary's statements to JVP were consistent with what he said to Dr. Dranov and his father directly after the incident and to a PA Court of Law under oath......No, I absolutely did not see or eyewitness a direct sexual act, let alone sodomy or anal intercourse, - actually I saw nothing below the parties' upper bodies in the shower - but I believe sex was going on because before I saw the extremely brief couple second glimpse via the mirror, I heard noises that were definitely consistent with sex and then when I saw the brief reflection in the mirror their proximity and body juxtapositioning was also consistent with that despite the fact I saw nothing below their upper bodies and did not actually see or eyewitness a sex act of any kind AND I NEVER TOLD ANYONE I DID SEE SUCH A THING.
IOW, Mike McQueary's testimony in a Court of Law under oath DIRECTLY CONTRADICTS the OAG's claims in several important ways - first, it obliterates their claim that MM eyewitnessed a sex act of any kind, let alone "anal rape", "sodomy", "anal intercourse", and all the other words they choose to use; second, it renders all of Mike McQueary's statements about what was going on in the shower as CLEAR CONJECTURE and INADMISSIBLE...not "eyewitness testimony"; third, it directly CONTRADICTS the OAG's claim that Mike McQueary said he did eyewitness such a thing; and finally, it confirms the story's of Dr. D, JM, JVP, TC and GS that while MM provided lots of wild speculation as to what might have been going on based on what he heard, but did not see, MM CONSISTENTLY told everyone the SAME THING as to what he actually very briefly saw - two people in the shower in close proximity of one another, using the same shower-head, doing something, but he couldn't say what for sure because he could not see anything below their upper-bodies.....but he thought it might have been sexual in nature due to what he had heard since he walked in, but this element was ALWAYS qualified as speculation on MM's part to EVERYBODY he spoke with and when pressed as to ONLY what he saw and did he see and eyewitness a sex act MM ALWAYS reversed course and said something like - no, I can't say that I saw that but I do think that may have been going on.... When pressed to place a description on what he saw and only what he saw, MM would say two people sharing the same shower-head - I don't know what you would call it, but at best it was highly inappropriate....
Without the OAG clarifying for JVP that all of MM's conjecturing was irrelevant, of course MM implied that his "concerns", and the reason he was so upset, was because he THOUGHT what MIGHT have been going on in the shower was of a sexual nature BUT he did not actually eyewitness a sex act, nor did he know for sure what was going on in the shower based only on what he ACTUALLY SAW AND EYEWITNESSED. Of course both Dr. D and JVP realized that MM's hysterical CONJECTURING meant nothing as he would repeatedly contradict himself when pressed as to what he actually saw (IOW Dr. D and JVP realized MM did not actually KNOW what was going on in the shower, but never said he saw a sex act and in fact said the diametric opposite when pressed to describe what he ACTUALLY saw and eyewitnessed).