Susan Brockbank was an LAPD criminalist assigned to the trace analysis unit, where her work included hair and fiber analysis. Called by the prosecution in June 1995, she testified across two days under direct examination by Marcia Clark about trace evidence work after being assigned to the case on June 21, 1994; Robert Blasier's cross-examination addressed the limits of hair and fiber comparison, possible evidence transfer and cross-contamination, glove sizing, and differences in reported hair counts. In the December 1996 civil trial, Brockbank also testified that the gloves, Bronco carpet, and knit cap from multiple crime scenes had been kept in one box.