How has this furthered the investigation?
Quite possibly it hasn't, at least in the sense I think you mean.
In the early days of my blog, I could see the human blood turning up in the PJ Files. I could see the removal of evidence by a PJ Inspector. I could see Amaral requesting a hurry up on the analysis from the INML shortly before he got hoiked. After that, I could find nothing.
So I wrote that up as such on my blog, and the viewing stats in the interim made it clear there was a fair degree of interest in 'human blood at Quinta dos Figos'.
As it happens, this is one of the things I emailed to OG, with nowt but the standard auto-response. Hopefully, they had already sorted this point out.
In my defence, I did extensive searches on the subject before I did my blog entry. One of the problems of Internet searches is they can be hit or miss. If the info that the blood was male was out there already, it did not turn up. If it has been covered on this forum already, I did not find it.
Check the OP. I currently believe the reason for this is someone had looked at what I had written two years ago on my blog on this topic.
I have updated my original blog post to show that the blood was analysed and was male. With the intent of not leading others to think there was 'disappearing human blood' evidence. So while it will not alter the course of OG, perhaps a few folk who still read my 'antique' blog posts will get a more accurate picture.