In the case of the university student who was lynched, did the crowd even try to report him to the police and provide their evidence, or did they just go ahead with the lynching?
Apparently they reported to the university administration which failed to take action and may even have tacitly accepted the decision of the mob (presumably because of fear of reprisal themselves). But the good thing is now the police can take action against the killers because they took the law into their hands.
The police (local, not university) were on the scene egging the crowd on, according to some reports from those university staff on the scene who weren't involved. The university security chief started it all with a threat to kill him at a staff meeting called to discuss his case.