DNA Expert Sherry Culhane Testifies In Steven Avery Trial

Sherry Culhane, a forensic scientist in the DNA section of the Wisconsin State Crime Lab testified and defended her results that show Steven Avery as the origin of blood and DNA found in Teresa Halbach's sport utility  vehicle in 2005. Avery's attorneys argued that since Culhane's own DNA was found in a negative control sample (that is supposed to be devoid of any DNA), the tests should have been deemed inconclusive and new testing should have taken place. That can't be done, however, because the entire DNA sample was consumed during the initial testing.