Tsuyoshi is a complete prick lol, those are his guys and they got run over by a car, that's attempted murder but he doesn't care because it's his girlfriend's brother who did it.
This is why I never fully sympathise with him in any of the arcs so far, he's just so selfish and self-pitying.
Obviously Teru is wierd about him ever since the boat arc but Tsuyoshi has chosen to cut himself off from everyone he knows except for that one guy who is obsessed with him because he can't trust anyone who's world doesn't revolve around him.