The defense continued its attack against damaging DNA test results by again suggesting blood stains were contaminated and by questioning the competency of the testing laboratory.
Dr. Robin Cotton of Cellmark Diagnostics conceded that her laboratory in the past had twice made false matches in DNA testing due to sample handling error or cross-contamination, in which blood from one sample was inadvertently mixed with blood from another.
WITNESSES
Robin Cotton, laboratory director of Cellmark Diagnostics