The LAPD Crime Lab (SID), within the Los Angeles Police Department's Scientific Investigation Division, was described as a workplace for collecting, preserving, processing, and analyzing evidence. Dennis Fung testified in the civil proceeding that evidence was taken to the crime laboratory for processing and the drawing of blood evidence, while Andrea Mazzola described crime-lab duties more generally as evidence collection, preservation, analysis, and expert testimony. During the criminal trial, witnesses including Fung, Mazzola, Gregory Matheson, and Michele Kestler were questioned about training, documentation, contamination controls, evidence handling, laboratory oversight, and records. Defense expert Dr. John Gerdes testified about chain-of-custody failures and cross-contamination risks, and attorneys repeatedly disputed the reliability of SID's procedures rather than establishing those criticisms as adjudicated fact. Civil testimony also addressed evidence processing at the laboratory and routine SID documents concerning deliveries of evidence from other offices.