 During cross-examination Matheson admitted that Fung and Mazzola made several mistakes during evidence collection.He admitted the blood from the bronco and back gate at Browns home should have been collected on June 13, not July 3, she should have used three separate swatches to collect from three different spots on the bronco not just one, and the evidence should have been refrigerated after collection in the police van.When asked about the 1.5mL of Simpsons blood unaccounted for he stated that Peratis didn't document how much was taken from Simpson so there is no way to prove that blood is actually missing.