Det. Philip Vannatter was an LAPD detective and lead investigator who testified as a witness in the preliminary hearing, criminal trial, and civil trial. His testimony addressed the investigation and evidence handling, including the glove found at the Rockingham property, Simpson's reference-blood envelope, and the examination of shrubbery near the property. The defense challenged his procedures and argued during civil closing that he had planted blood evidence; the civil plaintiffs disputed that theory by invoking the DNA evidence.