Board Thread:General Discussion/@comment-131.107.159.46-20131202174124/@comment-175.159.163.39-20131203082741

I vaguely recall (but need to check again) that Rose mentioned something like Liquid's body was buried instead of Solid Snake's. I would assume Liquid's body is deteriorated to an extent that after two years not only the fingerprints are gone, but also the obviously different hair colour is gone too. So that leaves the DNA test to be the only way to identify a dead body.

As to the test, it never mentions how detail they went for it. Everyone seem to assume that the twin Snakes are identical at the DNA level (because they are clones), the DNA test should pass easily unless one knows where exactly does Solid and Liquid differ on the DNA level (and it seems only very few people know this even during the first half of MGS4)