Defense could pin hopes on insect life By Kristen Green UNION-TRIBUNE STAFF WRITERJune 30, 2002 In the first four weeks of David Westerfield's murder trial, jurors were schooled in scientific evidence such as blood and DNA, fingerprints and fibers. Now they'll get a crash course in the life cycle of flies. Westerfield's team of lawyers is expected to launch his defense this week, and lead attorney Steven Feldman has hinted that he will use insect biology to prove 7-year-old Danielle van Dam died after police and reporters began tracking his client's every move. That would mean Westerfield couldn't have killed...