> It's possible the birds knew OP wasn't the killer and were hoping to intimidate them into leaving the body alone in hopes of catching the real killer,
Or the birds remembered the real killer of their fellow crow but then OP showed up and so therefore, ipso facto, he must've killed the crow but they couldn't know both couldn't kill the crow because they are birds so shriek.
Or the birds remembered the real killer of their fellow crow but then OP showed up and so therefore, ipso facto, he must've killed the crow but they couldn't know both couldn't kill the crow because they are birds so shriek.