Because janitors are in a position of power, right? You are the one who isn't getting it and won't step back and look at the whole picture. You are too wrapped up in your buddy being innocent or whatever.
When a person in a position of power fails to act (and no, I don't count telling your dad/supervisor as acting) he should no longer be trusted in a position of power.
It's simple.
If you think a person with such low morals that they can't even take real action on something they witnessed should be in a position of power... then idk... you are an idiot and there is nothing more to say I guess.
"Hello, 911? I've witnessed a little boy being raped at the football complex"
"oh, What is your name?"
"Derp McJanitor"
"I'm sorry, you have the wrong number. Have a great day."
-----------------------------------------------------------------------------------------------
"Hello 911? By and Large an employee has witnessed a youngster being raped."
"What is your name?"
"Joe Pa."
"OK, I'll send someone right over!"