rudy gadai, a known petty criminal from the ivory coast who fled to germany shortly after the murder.turns out his handprint made in meredith kercher's own blood was found in the victim's room. his dna found inside the victim's body in her vagina. his dna on her clothing, on her purse. his feces even found on used toilet paper left near an unflushed toilet down the hall. and something else. he didn't even know raffaele and had only met amanda a few times with neighbors. knowing all of that and when he finally got extradited from germany back to italy, we thought thank god this is over. >> reporter: it wasn't. the prosecutor simply swapped suspects. amanda knox, raffaele sollecito and now rudy gadai had come to meredith kercher hoping to include her in an orgy. when kercher refused, they pulled out knives and killed her. the prosecutor would stick to his instincts despite the forensic evidence. you were fixated, according to the defense, on amanda knox and raffaele sollecito, and kept imagining new scenarios that made these two people guilty. >> translator: no, absolutely not. i did wh