I'm interested in this sort of thing, so I looked around for it. This is all I could find: https://usahitman.com/gmaxwell-stegophoto/ and this video: https://www.youtube.com/watch?v=H3lq0uGRrLo

The fact that none of the usual group of experts haven't been all over this despite all the "evidence" being right there in the open, and neither of the links I found are authoritative in their authorship and presentation, I'll leave any judgement of veracity up to you.