 He testified to the results from DQ Alpha DNA matching.His results also showed Nicole Browns blood on the sock found at Rockingham with a 1-in-7.7-billion chance of error, the blood on the back gate at Brown's home matched Simpson and the blood found inside the Bronco belonged to the two victims with a 1-in-21 billion chance of error for both.During cross-examination the defense insinuated the matches were from the results from cross-contamination.