My question is, how do you "prove" this.

We have cases in India where someone was held to not having been commited a crime 30 years after being first caught taking few bucks.

They lost their life, earnings, social status and in the end a judge says "you are free to go" but there is no compensation. https://www.news18.com/india/declared-innocent-after-30-year...

Or this case

https://indian.community/news/delhi-high-court-upholds-convi...

But it doesn't mean corruption isn't caught or people don't care. They do, it's just people get away with a lot of things