Commonwealth v. Read — Trial ArchiveDaniel Wolfe Direct Examination
Wolfe summarized laboratory and full-scale testing and gave opinions that the subject taillight damage and hoodie damage were inconsistent with the tested arm-impact scenarios.
View moment →Day 28 - June 6, 2025
Dr. Daniel Wolfe testified about ARCCA testing, its stated conclusions and limits, and related court rulings.
Full day summary
Notable Moments
Daniel Wolfe Direct Examination
The judge sustained repeated objections and directed the defense to compare science and testing rather than ask Wolfe to characterize Dr. Welcher's adherence to the scientific method.
View moment →Daniel Wolfe Cross-Examination
Wolfe said he did not cite, and could not identify, a source supporting use of the hybrid-three arm for opinions about clothing tears or skin abrasions.
View moment →Daniel Wolfe Cross-Examination
Wolfe said the vehicle data could not identify a row showing when an alleged contact occurred or establish a speed outside the recorded data.
View moment →Daniel Wolfe - Redirect
Wolfe contrasted the full-impact test damage with the holes in John O'Keefe's sweatshirt, describing the test damage as road rash.
View moment → Notable Quotes
Daniel Wolfe
“All of the test data that we did from the laboratory testing moving up to full scale vehicle testing, all of the collected data in terms of the photographs, the observations, all the acceleration data collected, so all of the testing that we've walked through in this PowerPoint along with certainly that was based upon all generally accepted and peer-reviewed methodologies in the accident reconstruction community.”
Wolfe stated the basis for his opinion that the tested arm-impact scenarios were inconsistent with the subject taillight damage.
Daniel Wolfe
“If contact allegedly occurred at some point in that data set, no, you would not be able to pick a row in that data and say this is where that collision occurred.”
Wolfe described a limit on what the recorded vehicle data could establish about the timing of a contact.
Daniel Wolfe
“No, this is distinctly road rash. There's a clear distinction between the two.”
Wolfe distinguished the damage from the full-impact test from the punctures in O'Keefe's sweatshirt.
7h 13m 1. Daniel Wolfe — Direct
Dr. Daniel Wolfe testified for the defense about ARCCA testing that he said supported the glass damage but did not match the taillight damage or hoodie holes in the arm-impact and center-of-mass tests.
Direct 1487 lines
Daniel Wolfe Alan Jackson
5 sidebars inside this proceeding
- ARCCA Hiring and Credibility Questions The parties disputed questions about who hired ARCCA and whether they could imply an insurance-company connection; the judge halted the line until credibility is challenged.
- Limits on ARCCA Retention Testimony The parties disputed characterizations of ARCCA's relationship with the defense, and the judge limited direct examination to the March retention while barring references to the other hiring entity.
- Expert Science Versus Credibility The parties disputed whether the witness could criticize Dr. Welcher's work, and the judge required questions to compare scientific methods, data, and testing rather than assess the person.
- Defense Witness Schedule and Materials The court discussed the remaining defense-witness schedule, Dr. Rentschler's PowerPoint, and the timing and scope of materials for Dr. Welcher's testimony.
- Slide 51 Arm Position Clarification The parties clarified that slide 51 showed an arm position from Dr. Welcher's experiment, not a claim about John O'Keefe's actual arm position.
2. Daniel Wolfe — Cross
Mr. Brennan questioned Dr. Daniel Wolfe about his defense communications and the foundation and limits of ARCCA's taillight testing.
Cross 1156 lines
Daniel Wolfe Hank Brennan
3 sidebars inside this proceeding
- Witness Duty to Correct Mistake The parties disputed whether the witness should have independently corrected a prior mistake about experience, and the judge agreed the witness need not have volunteered it.
- Titles of Referenced Studies The parties disputed whether cross-examination could use titles of studies cited in Dr. Rentschler's materials to test the witness's familiarity and foundation for an opinion.
- Hard Ground Question Objection Counsel argued that a question about hard ground was vague because the witness sought clarification between grass and asphalt; the judge overruled the objection.