 When Judge Ito instructed Gerdes to narrow his testimony to facts about this case during cross, journalist noted his demeanor changed as his contamination claim became more dubious.He claimed it was possible for 100% of the "real killers" DNA to degrade so every molecule was gone in the seven hours they had spent unrefrigerated in the police van but then admitted that scientists had gotten analyzable DNA for PCR tests from mummies and even fossils.He also admitted that contamination for the results at Cellmark's and the state department could only have occurred at the crime scene since LAPD packaged and ship most of the evidence they tested directly there.