I'm guessing the guy died too? You didn't exactly specify, and you can definitely OD and not die. Sorry to hear it if he died, but I'm not inclined to feel bad if he didn't.
Yeah, it still hurts to have someone OD if you know them, even if they don't die. Our vocalist died, unfortunately. He was on acid for sure, a shitload of it. He might have been on speed and alcohol too, not sure.