Oh sure, McQueery just somehow guessed that Sandusky was a pedo who liked to diddle little boys and got it right. What a coinkydink!
McQueary saw "something." He told his father, a coach, and the VP responsible for the University police "something." (And based on his testimony, it's likely he told each of them "something" else.)
Unfortunately, we will never know what the "something" was, because McQueary has told many different stories under many different circumstances to many different audiences.
What we KNOW about McQueary's "something" is that of all of the charges made against Sandusky, McQueary's evidence was one of the very few not believed by a Jury.
That is not a coincidence. McQueary is not believable.