The person who is being protected doesn't matter. It could be a mafia boss, a president, a witness in a protection program, a paranoid nut, anyone, it doesn't matter because, presuming that the person in question is not doing anything unscrupulous at that time, Bolin is not complicating himself in any kind of wrongdoing. That makes him as innocent as any robbery victim. That it's a mafia boss means nothing except that there is a higher chance of something unscrupulous happening, but you can't judge someone on probability. The president may very well be doing something behind closed doors, people who want to kill him might be justified, but until the security detail is complicit in some wrongdoing, they are innocent.
I'd call it a bad idea because it's risky and dangerous, but nothing inherently wrong about it.