Day 21 - May 27, 2025

Judge Beverly J. Cannone · Trial 2 · 3 proceedings · 974 utterances

Day 21 of 36

Appearing:

Accident reconstructionist Judson Welcher testifies for the prosecution on vehicle telematics, tail light damage, and pedestrian biomechanics — but his ultimate collision opinion is stricken by the judge pending a ruling.

Full day summary

Day 21 centers entirely on prosecution expert Judson Welcher of Aperture LLC, an accident reconstructionist and biomechanical engineer. The day opens with a voir dire in which defense attorney Alessi extracts that prosecutor Brennan suggested changes to Welcher's PowerPoint, and that adopting colleague Steven Burgess's revised timing variance causes the alleged collision trigger window to partially overlap with a device lock event on O'Keefe's phone — a material shift in the prosecution's timeline. Welcher then testifies at length on three fronts: Toyota Techstream data placing a high-speed reverse acceleration event at 34 Fairview between 12:32:04 and 12:32:12 a.m.; photogrammetric analysis of Ring doorbell footage ruling out the driveway contact as the source of tail light damage; and biomechanical testing linking O'Keefe's arm lacerations to the Lexus tail light geometry. Before the jury is dismissed, Judge Cannone strikes Welcher's ultimate opinion that the Lexus struck O'Keefe, reserving her ruling on whether that conclusion falls within permissible expert testimony. The defense argues collision is the ultimate jury question; the prosecution responds that mens rea — not the collision itself — is the ultimate issue at trial.

Key Moments

Alessi establishes during voir dire that prosecutor Brennan personally suggested modifications to Welcher's presentation, raising questions about expert independence.
Welcher concedes that applying Burgess's timing variance shifts the trigger window so that part of the range now falls after a device lock event on O'Keefe's phone.
Welcher testifies to a high degree of engineering certainty that the low-speed driveway contact at O'Keefe's residence could not have broken the upper right tail light.
Welcher links O'Keefe's arm lacerations to the Lexus tail light geometry through exemplar vehicle testing and biomechanical analysis.
Judge Cannone strikes Welcher's ultimate collision opinion and reserves her ruling overnight, requesting copies of defense expert reports.

Notable Quotes

Judson Welcher

“You do.”

Welcher's one-word concession — 'You do' — is the pivot of the voir dire, confirming that the Burgess variance creates a timeline overlap that undermines the prosecution's sequence of events.

Judson Welcher

“That impact did not break or crack that tail light... That's to a high degree of engineering certainty.”

Welcher's ruling out of the driveway contact as the tail light source is the linchpin of the prosecution's physical evidence theory — pointing the jury toward a separate, unwitnessed collision event.

Robert Alessi

“The question of whether there was a collision is the ultimate question for the jury. That is why we are having this trial.”

Alessi's framing of collision as the ultimate jury question anchors the end-of-day legal dispute and directly determines whether Welcher's most damaging opinion reaches the jury.

Voir Dire

Judson Welcher Robert Alessi

99 utt.

Defense attorney Robert Alessi conducts voir dire of prosecution expert Judson Welcher (Aperture LLC) regarding recent modifications to his PowerPoint presentation. Alessi establishes that prosecutor Brennan suggested changes to the presentation, including deleting a slide and modifying content related to the Dighton route distance. The central issue is Welcher's planned testimony incorporating a timing variance from colleague Steven Burgess's May 8th report, which shifts the window for trigger event 11622 (originally 12:31:38–12:31:43). Alessi extracts the admission that with Burgess's variance applied, part of the trigger range now falls after a device lock event on John O'Keefe's phone — whereas previously, the device lock occurred after the entire trigger range. Welcher maintains the original data was already within acceptable measurement variance.

+1 procedural segment

Direct

Judson Welcher Hank Brennan

844 utt.

Dr. Judson Welcher, an accident reconstructionist and biomechanical engineer from Aperture LLC, testifies for the prosecution across three areas of analysis. First, he walks the jury through Toyota Techstream data from Read's Lexus, identifying two triggering events on ignition cycle 1162: a three-point turn on Cedarcrest Road and a second event approximately 8 minutes later involving forward motion followed by high-speed reverse acceleration at 74% throttle, which he places at 34 Fairview between 12:32:04 and 12:32:12 a.m. Second, using photogrammetric analysis of Ring doorbell footage from O'Keefe's residence, he concludes that the low-speed contact between Read's Lexus and O'Keefe's Traverse at approximately 5:07 a.m. — measured at 1 mph or less with only 2-3mm of overlap — could not have broken the upper right tail light. Third, he presents pedestrian impact biomechanics, demonstrating through exemplar vehicle testing that the lacerations on O'Keefe's right arm are consistent with the geometry of the Lexus tail light, and that a backward fall from standing height onto a hard surface generates sufficient force for skull fracture. His ultimate opinion — that Read's Lexus struck O'Keefe — is stricken by the judge before the jury is dismissed.

Procedural

Procedural - Motions (Welcher)

23 utt.

After Dr. Welcher steps down temporarily, defense attorney Alessi argues that whether a collision occurred is the ultimate question for the jury and no expert should be permitted to opine on it. He contends the permissible questions are limited to whether vehicle damage is consistent with a pedestrian strike and whether injuries are consistent with being hit by a motor vehicle. Prosecutor Brennan responds that the ultimate issue is mens rea and manslaughter, not collision, and that Welcher's opinion based on telematics data, physical evidence, and independent studies is properly within expert testimony. Brennan cites Commonwealth v. Coleman in support. Alessi counters that the defense experts (Wolfe and Rentschler) limit their opinions to consistency, not collision conclusions. Judge Cannone reserves her ruling for the following morning, requesting a copy of the defense expert reports.

◀ Day 20 Trial 2 Day 22 ▶

Day 21 - May 27, 2025

Judson Welcher - Voir Dire

Judson Welcher - Direct (Part 1)