The that fact that people know messing with the police could get you arrested even if you are right makes them turn their faces away and don't say anything, it's very obvious that the people are not agreeing and they don't want her to get arrested, but since they know that the same thing could happen to anyone of them makes them ignore the whole thing and act normal.
So the incident itself is a proof that everyone is afraid of the misuse of police, so they don't even talk about it which shows how coward people are
If this guy who arrested her wasn't a police member, but just a normal guy with a gun, maybe we would have seen someone helping her, but you know why, because he knows tgat everyone will consider him a hero, but she being arrested by a police officer, if anyone intervenes he will be guilty.
People are slaved by the authorities and deep in their minds they know that, they know they can't protect themselves or those who they love, soy they just hope they are not the ones who get arrested