" I'm starting to feel like i'm in the gfaqs board lol, usually people are very helpful here "
Heh, awe, i was just trying to be silly. As for what killed the bird, I think it's open to your interpretation, but I choose to think he killed the bird. Maybe not on purpose, not necessarily with malicious intent, but I think he killed it nonetheless. Your reaction to that as a father might be different, but I'd probably have done the same thing. I comforted him, not necessarily confronting him with the question whether or not he killed it just then.
I glanced at this list before I had finished the game (I know, i know, shame on me). Thinking, "What the heck does Shelby do to piss off Lauren so much in all these peoples' games? I kind of like their relationship, how she tags along with him as his sidekick. Plucky hooker ex-mother and weathered P.I. with true grit." Then I got to play again later that night, and now I'm thinking, "Oh, yeah, that."