I don't know, and I doubt anyone has ever been arrested for bribing a police office over a speeding ticket. But I think a few people have at least been investigated for paying bribes to gain contracts for things like oil rights and arms deals. So, be careful boasting about your arms deals on HN :-)

To be fair these tend to be large multinational companies that have their investigations closed by the then prime minister.

That's a lot of oil being used to lubricate the wheels of justice.