reminds me of every undercover cop story. the best friend of the kingpin always trying to warn him.. they been friends 50 years and some new shows up right after you been successfully robbing banks for 30 years. he becomes the new best friend while the old guy is seen as crazy for thinking he's a cop
For real. I think the only movie I've seen that avoided that cliche was Infernal Affairs and The Departure (which is an American adaptation of Infernal Affairs.)
Dude under cover stayed getting scrutinized.