The dangerous friend of your brother could end up in a few different scenarios, depending on the circumstances. If they're involved in illegal activities, they might eventually face legal consequences—arrests, trials, or even prison time. I've seen this kind of situation unfold in crime dramas like 'Breaking Bad,' where reckless behavior catches up with characters sooner or later. On the other hand, if this friend is just a bad influence, your brother might eventually distance himself once he realizes the toxicity. Personal growth can change relationships dramatically.
Alternatively, sometimes people like that have a tragic arc—burning bridges, losing allies, and spiraling downward. It’s heartbreaking to watch, but not uncommon. If your brother cares about this person, he might try to help, though that’s risky. Either way, these kinds of dynamics rarely stay static. Life has a way of forcing change, whether through consequences or personal realizations.