I think you have your facts wrong. There was really only one incident that reached Western news media and four men were executed for the incident (the fifth killed himself). The police identified and captured suspects almost immediately after the incident and it went to the courts right after. So I’m not sure where the claim that they weren’t prosecuted is coming from. You can view the timeline of the incident at https://edition.cnn.com/2020/03/19/asia/india-rape-execution...
Every now and then, a crime of such magnitude happens (the woman was assaulted to such an extent that her internal organs were damaged from iron rods inserted into her vagina, which speaks to more of cruelty and inhumanity, than the need for sexual gratification) that it captures the news cycle. This is the reason the case was quickly solved (quickly as in about 5 years)
But there are many rapes, that are not reported, or if reported, the victim seldom gets justice because of dragging in courts, etc.
And, in any judicial system, solid evidence is required, so rape of a woman in a field, at night, where she might not even remember the faces of her assaulters, might not have enough evidence, apart from circumstantial ones (in cases where the assaulters escaped), leading to no justice to her.
The scary thing is that the main perpetrator of that rape/murder was 17 years old and under Indian law couldn’t even be sentenced to a long prison term. He’s out and his name is unknown.
Those protests were mostly stupid. I agree there was anger and rage, but as you mentioned the arrests were swift. The protestors were basically demanding that the suspects be hanged immediately, without due process. Which is why I called it stupid.
