Confrontation Clause of Sixth Amendment and DNA Evidence

The Sixth Amendment of the U.S. Constitution guarantees the right of an accused to question “witnesses against” an accused.  This right is termed the “Confrontation Clause,” as it permits one to cross-examine a person has testimony that might support a conviction.  This fundamental right is meant to ensure a trial is fair.

In a rape case, DNA evidence from a victim is often sent to a laboratory for examination to see if it matches a suspect’s DNA.  The laboratory’s report is hearsay, as it is an out-of-court statement being offered for the truth of the matters stated therein.  However, the report may be admitted into court if the defendant had an opportunity to cross-examine the analyst who prepared the report (i.e. to question if the person followed proper procedure, if the person was sufficiently trained, if there were any problems during testing that affect the certainty of the results, etc.), but the analyst is then unavailable at time of trial.

In two recent U.S. Supreme Court case, Melendez-Diaz v. Massachusetts (2009) 557 U.S. 305 and Bullcomings v. New Mexico (2011) 564 U.S. ___, the U.S. Supreme Court held that scientific reports could not be used as substantive evidence against a defendant unless the analyst who prepared the report was subject to cross-examination.  

In other words, the Sixth Amendment’s Confrontation Clause seemed to protect the defendant from some analyst who could prepare a damming, sloppy and unreliable report and then hide away without being cross-examined about their work.  Melendez-Diaz and Bullcomings seemed to mean a prosecution could not succeed unless the laboratory analyst testifies and the report’s credibility is evaluated.

In the recent United States Supreme Court case of Williams v. Illinois (2012 DJDAR 8091), a defendant’s right to solid evidence seems to have taken a step backwards.  In Williams, a swab sample was taken from a rape victim.  The sample was then taken to an outside laboratory.  A sample of Williams’ blood was then taken by the Illinois Police lab to the outside lab, which then matched it to the swab sample.  

At Williams’ bench trial (not a jury trial), an expert forensic specialist testified that Williams’ the DNA on the swab sample matched the DNA in Williams’ blood, but the outside laboratory’s report was not admitted into evidence.  Moreover, the expert had no personal knowledge of how the outside laboratory tested the swab sample or if the lab followed proper protocol.  The expert only testified that the outside lab  was an accredited laboratory and that business records showed a sample went to the lab and was returned.  The expert could not vouch for the accuracy of the testing by the outside laboratory.

Williams’ counsel objected to the expert’s testimony insofar as it involved events at the outside laboratory because the Sixth Amendment’s Confrontation Clause guaranteed Williams the right to cross-examine the analyst who did the testing and found the match.  The trial court overruled the objection and Williams was convicted of rape.  

Williams appealed the ruling to the Illinois Court of Appeal and the Illinois Supreme Court, both of whom held that the expert’s trial testimony did not violate Williams’ confrontation rights because the outside laboratory report was not offered into evidence to prove Williams’ guilt of rape, but only to prove the truth of the DNA match.

Williams thought this reasoning was wrong, so he appealed to the United States Supreme Court.  The U.S. Supreme Court, however, agreed with the Illinois Supreme Court, noting first and foremost that because the case was a bench trial and not a jury trial, an expert may disclose inadmissible evidence.  The U.S. Supreme Court commented that a judge would be able to draw a distinction between the limited testimony of the expert and resist making a wider, wholesale conclusion that there was a proper chain of custody and all protocol was followed.  Moreover, the U.S. Supreme Court noted that the victim pointed out Williams in a line up and identified him at trial as her attacker.

Consequently, Williams’ appeal was denied and his conviction was upheld.

For more information about the Sixth Amendment, click on the following articles:
  1. Sixth Amendment Not Violated in Rape Case When Expert Introduces Hearsay That Supports Conviction
  2. Sixth Amendment Not Violated in DUI Case When Someone Testifies About Lab Report by Someone Else
  3. How Does the Sixth Amendment Affect My Right to Cross Examine a Witness with Knowledge About a Lab Report?
Contact Greg Hill & Associates 
Client Reviews
Thank you so much for putting so much effort in this case. We really appreciate it and we are happy that all turned out well.
★★★★★
Greg Hill did an outstanding job on every level. He was efficient, thorough, knowledgeable, courteous, responsive & brilliant. He welcomed my input and my concerns. . . from the first conversation to the last - I always felt 'it mattered' to him. S.C., Rolling Hills Estates
★★★★★
Thanks again for your hard work. We want you to know that we are very appreciative of all that you have done [on our son's] behalf. With warmest regards, L.H., Torrance
★★★★★
Dear Greg, Thank you again for all your help. Your professionalism and thoroughness is greatly admired. I will definitely recommend you to my friends if they ever need legal help. V.L., Carson
★★★★★
Thanks for investing in my case. I talked to other attorneys out there and they had an arms-length of attitude, but not you. Your intensity and interest helped a lot. C.R., Pomona
★★★★★