Not sure I'd call it a retweet, since I'm not posting it on Twitter. But I just found out, and there are probably other people who haven't heard yet - so I figured I'd let them know.
What I meant was whoever posted that tweet, assuming it is Doyle's account, did it posthumously then, if it isn't a retweet. Or he's reaching out beyond the grave to toss in one last chip for the rake!