Every year around Easter, the Christian media trots out "the latest" evidence that the Shroud of Turin is not a fake. The latest "evidence" is that the "blood" on it is from a person who sustained polytrauma (
link).
The following links present the best-unbiased evidence on the Shroud of Turin: it probably is a fake (still).
Image Formation and the Shroud of Turin
Rational Wiki: Shroud of Turin