Don't you think they checked forensic evidence of everyone as well as everywhere Danielle had been? Um, no. Didn't you listen to testimony of the criminalists where they stated under oath that they did not test anything that pointed away from Westerfied?
Note to self: get new batteries
TJ Alert
You are so correct. Any evidence that didn't match with DW's "environment" was discarded. The fibers from BVD's orange sweater weren't compared to other orange fibers. And she does have an orange sweater. She wore it to court.