deparvine. >> deparvine discarded the cup and the spoon, and investigators immediately retrieved thepoon from the trash. >> the technology has become incredibly sensitive and incredibly powerful. and there is the ability to obtain dna from the smallest piece of evidence in a very reproducible, very reliable manner. >> on the spoon, scientists found saliva. they extracted dna and compared to it the blood found on the steering wheel of the van dusens' jeep. the results left no doubt. >> the dna profile that was developed from the steering wheel was matched to the dna profile that was obtained for william deparvine, his known standard. >> william deparvine? >> william deparvine was arrested and charged with first-degree murder. yet he continued to maintain his innocence. he claimed his neighbor henry sullivan was the culprit, and the drivers license proved it. a jury would have to decide. your hepatitis c.forget it's slow moving, you tell yourself. i have time. after all there may be no symptoms for years. no wonder you try to push it to the back of your mind and forget it. but here's s

deparvine. >> deparvine discarded the cup and the spoon, and investigators immediately retrieved the spoon from the trash. >> the technology has become incredibly sensitive and incredibly powerful. and there is the ability to obtain dna from the smallest piece of evidence in a very reproducible, very reliable manner. >> on the spoon, scientists found saliva. they extracted dna and compared to it the blood found on the steering wheel of the van dusens' jeep. the results left no doubt. >> the dna profile that was developed from the steering wheel was matched to the dna profile that was obtained for william deparvine, his known standard. >> william deparvine? >> william deparvine was arrested and charged with first-degree murder.