I guess you could start here

https://en.wikipedia.org/wiki/List_of_American_federal_politicians_convicted_of_crimes

Brazil and Peru have also had high profile coup attempts in the past couple years, Brazil recently convicted and the guy from Peru is still in exile in Mexico, which has been hurting relations. Oh, and South Korea

Wait, you mean, anywhere? Look at every coup, every deposed dictator (e.g. Ceaușescu, Gaddafi). Around the world there are countless stories of politicians who are imprisoned for embezzling or other corruption. That’s a pretty common thing all over.

Now, yes there are a ton who commit crimes in office and we just don’t know about it or they’re never prosecuted, but that doesn’t mean it doesn’t happen.