Dr. Terence Speed, a professor of statistics at UC Berkeley with decades of academic and research leadership in Australia and the UK, testified for the defense over two days in August 1995 as their DNA statistics expert. Called by Peter Neufeld, Speed's role was to challenge the prosecution's population frequency estimates for the DNA evidence — statistical calculations that told the jury how rare a given DNA match would be. Prosecutor Rockne Harmon mounted an aggressive cross-examination, attacking Speed's qualifications and pressing the point that prosecution expert Dr. Weir's frequency estimates were the only case-specific statistical analysis before the jury.