. >> greg hampikian is a forensic biologist at boycee state university and director of idaho's innocence project. he also was working with the knox defense team. he says italian investigators did a good job processing the crime scene, collected excellent evidence, but clung to shakier evidence that proved their theory, a classic error, he says, a prosecutor who trusted his gut feeling instead of the science that at that time was pointing to another suspect. >> they didn't like the way amanda behaved, whatever that means, and so they wanted to investigate her and raffaello and her boss. when the dna is finally processed, it's not any of their suspects. so what do you do? what would you do? you let them go. >> as patrick lumumba was being released from jail, investigators analyzing the bloody evidence left at the crime scene found an entirely new suspect. his name? rudy guede, a known petty criminal from the ivory coast who fled to germany shortly after the murder. it turns out guede's handprint made in meredith kercher's own blood was found in the victim's room. guede's dna found inside t

. >> greg hampikian is a forensic biologist at boise state university, and director of idaho's innocence project. he also was working with the knox defense team. he says italian investigators did a good job processing the crime scene, collected excellent evidence, but clung to shakier evidence that proved their theory, a classic error, he says, a prosecutor who trusted his gut feeling instead of the science that at that time was pointing to another suspect. >> they didn't like the way amanda behaved, whatever that means, and so they wanted to investigate her and raffaele and her boss. when the dna is finally processed, it's not any of their suspects. so what do you do? what would you do? you let them go. >> as patrick lumumba was being released from jail, investigators analyzing the bloody evidence left at the crime scene found an entirely new suspect. his name? rudy guede, a known petty criminal from the ivory coast who fled to germany shortly after the murder. it turns out guede's handprint made in meredith kercher's own blood was found in the victim's room. guede's dna found inside th

forensic expert greg hampikian says finding dna but no blood makes it highly unlikely the knife was used in a bloody murder. he also says it's surprising the prosecutor was even allowed to admit such a small, unexplainable sample as evidence. >> would this have made it into a u.s. court? i don't think this would have made it onto a u.s. lab report. >> what also made it into court was amanda's so-called confession. in a quirk of italian law, the confession was thrown out of the criminal case against knox, but jurors heard it anyway as part of a civil case being tried simultaneously. in court jurors heard mignini's evidence of guilt, then when they went home each night, they heard the news from a tabloid press gone wild. sensational headlines about the murder suspect dubbed foxy knoxy were rampant. completely fabricated stories of how amanda knox engaged in sexual orgies, satanic rituals, how she bought bleach to clean up the crime scene. all of it according to the prosecutor himself lies. with no conclusive evidence their daughter was guilty, the knox family would enter the courtroom just

. >> greg hampikian is a forensic biologist at boise state university, and director of idaho's innocence project. he also was working with the knox defense team. he says italian investigators did a good job processing the crime scene, collected excellent evidence, but clung to shakier evidence that proved their theory, a classic error, he says, a prosecutor who trusted his gut feeling instead of the science that at that time was pointing to another suspect. >> they didn't like the way amanda behaved, whatever that means, and so they wanted to investigate her and raffaele and her boss. when the dna is finally processed, it's not any of their suspects. so what do you do? what would you do? you let them go. >> as patrick lumumba was being released from jail, investigators analyzing the bloody evidence left at the crime scene found an entirely new suspect. his name? rudy guede, a known petty criminal from the ivory coast who fled to germany shortly after the murder. it turns out guede's handprint made in meredith kercher's own blood was found in the victim's room. guede's dna found inside th