Violation of Human Rights: You know, you saw. Why don't you help the victim get justice?

What is puzzling me for quite a while now is why nobody in Academia will move to stop crime against fellows, superiors or inferiors. Instead, they will let it all happen, isolate the victim, and not offer not even a witness' note. The victim cannot save themselves most of the time, since this is almost the meaning of the word crime. By not offering the victim not even a witness' note, we are denying them minimum fighting chances against the system or whatever is happening. Would it be acceptable preserving our jobs or our courses or our titles at the expense of atrocity against others? Why would people not stop crime, offer witness' notes and other obvious things, such as employ the victim in order to give them minimum chance of fighting? I am definitely after the why here, and for long.