I've read it at many places. I'm not sure whether they were authentic sources. But in any case, is it grammatical to say 'A dead [proper noun]'?
A dead Michael Jackson
I mean an indefinite article for a proper noun?
[Here are some results; kindly consider the relevant ones]
I only had asked this question but then the explanation in the selected answer is specific. It talks about making difference between one and many with the same name. Here, it's not the case.