If this IS NOT a semen stain, it does not change much.
If it is semen and it belongs to Giacomo Silenzi, it does not change much.
If it is semen and belonged to Raffaele Sollecito, it changes everything I believe in and I am completely wrong,
Raffaele Sollecito is guilty of participating in in Meredith Kercher's murder.
If it is semen and belongs to Rudy Guede,
well Fulcanelli owes me a case of beer!
Dont forget the child killer who said Guede told him that a guy was standing over Meredith's body masturbating. Plus don't forget Guede's own words that Meredith might have been raped by another guy.