Day 30 - June 10, 2025

Judge Beverly J. Cannone · Trial 2 · 7 proceedings · 1,586 lines

Day 30 of 36

Appearing:

Dr. Elizabeth Laposata completed testimony on hypothermia and right-arm injury patterns. Dr. Andrew Rentschler began explaining impact tests and his opinion that a Lexus tail-light strike did not fit O'Keefe's head injury.

Full day summary

Day 30 opened with Judge Cannone's compromise ruling allowing Dr. Laposata to offer a single sentence that O'Keefe's arm injuries were consistent with an animal bite, but barring photographs and detailed dog bite analysis. On continued direct, Laposata testified that the absence of Wischnewski ulcers ruled out hypothermia as a cause of death and that X-rays showed no bone fractures anywhere in O'Keefe's right arm, supporting the defense's position that his injuries are inconsistent with a vehicle strike. Hank Brennan's extended cross-examination targeted Laposata's methodology — establishing that she excluded vehicle impact from her differential diagnosis before reviewing any vehicle data, speed information, or DNA evidence — and her credentials, introducing a 2005 Rhode Island audit of 1,500 incomplete reports and her departure following the Station nightclub fire. A sidebar produced a further ruling excluding text-heavy opinion slides from Dr. Rentschler's PowerPoint. Rentschler then began direct testimony, describing drop-testing that demonstrated a 15 mph tail light impact cannot produce the 1,400–1,600 pounds of force required for an occipital skull fracture, and explaining that the biomechanics of striking only the head would necessarily produce cervical spine injuries that O'Keefe did not have.

Key Moments

Judge Cannone issues a compromise ruling: Laposata may testify the arm wounds are consistent with an animal bite but may not present photographs or detailed dog bite analysis.
Laposata testifies that the absence of Wischnewski ulcers — present in over 90% of hypothermia deaths — rules out hypothermia as O'Keefe's cause of death.
Brennan establishes on cross that Laposata concluded the vehicle did not strike O'Keefe before reviewing any vehicle data, speed information, or DNA evidence.
Court allows impeachment of Laposata with a 2005 Rhode Island audit documenting over 1,500 incomplete or unsigned reports and her handling of the Station nightclub fire.
Dr. Rentschler testifies that drop-testing at 15 mph showed a tail light cover cannot generate sufficient force for an occipital skull fracture, and that the absence of cervical spine injury rules out a vehicle-strike mechanism.

Notable Quotes

Elizabeth Laposata

“No, not at all.”

Laposata's admitted answer that the patterned right-arm injuries did not correspond to irregular fractured plastic pieces impacting the arm.

Elizabeth Laposata

“It did not hit him. So it was not relevant to my opinion. I could — by looking at the body — I could tell that there was no evidence of impact with a vehicle. So whether the vehicle was going slow or fast is not relevant.”

The most damaging concession of the cross-examination: Laposata acknowledges she excluded vehicle impact before reviewing any vehicle-related evidence, the cornerstone of Brennan's methodology attack.

Andrew Rentschler

“A — that the force wasn't sufficient, or the acceleration wasn't sufficient, to produce enough force to cause a skull fracture at 15 miles an hour.”

Rentschler's headline finding closes the day — scientific testing shows a 15 mph tail light impact cannot produce the skull fracture, anchoring the defense's biomechanical case.

Watch this day Day 30 — Laposata, Rentschler Watch with synced transcript →

Procedural

Procedural - Motions

82 lines

Judge Cannone addressed two pre-testimony matters before Dr. Laposata's examination. First, the court reviewed photographs from Dr. Laposata's report, requiring Jackson to crop a brain stem image and confirming previously admitted exhibits (Wischnewski spots, stomach lining) could be reused. Second, Jackson argued at length that the Commonwealth opened the door to dog bite testimony by cross-examining Dr. Russell about Dr. Laposata's credentials and reports, creating a burden-shifting impression that the defense was hiding unfavorable opinions. Brennan countered that the defense used its own witnesses to vouch for credibility and introduce inadmissible hearsay. The court denied full dog bite testimony but allowed Dr. Laposata to testify that the arm injuries were consistent with an animal bite, with brief foundation only and no visuals.

Direct

Elizabeth Laposata Alan Jackson

474 lines

Alan Jackson resumed direct examination of Dr. Elizabeth Laposata, who explained how John O'Keefe's coup-contrecoup brain injury caused brain stem herniation and death within approximately 15-20 minutes, with immediate incapacitation upon impact. Laposata ruled out hypothermia as a cause of death, testifying that O'Keefe's stomach lining showed no Wischnewski ulcers — the diagnostic marker present in over 90% of hypothermia deaths — and no frostbite. She attributed stomach hemorrhaging instead to the Lucas mechanical chest compression device used during resuscitation. When discussing the device, Laposata stated a calculation of 37 minutes at 100 compressions per minute and described the result as more than 30,000 compressions; that arithmetic is inconsistent. Laposata testified that O'Keefe's patterned right-arm injuries were consistent with an animal bite or claw marks. She also stood by her report's conclusion that the right-arm pattern did not correspond to irregular fractured plastic pieces impacting the arm. The judge sustained multiple prosecution objections and struck several answers throughout, particularly when Laposata ventured beyond the specific questions asked.

Cross

Elizabeth Laposata Hank Brennan

377 lines

Hank Brennan conducted an extensive cross-examination of Dr. Elizabeth Laposata targeting several pillars of her direct testimony. He established that Laposata is not a neurosurgeon or neurologist and has no clinical experience observing brain injuries in living patients, then pressed her inability to provide objective criteria for her opinion that O'Keefe died within 15 minutes — eliciting her acknowledgment that she could not quantify the force involved beyond 'medium to large.' Brennan challenged her direct testimony that the brain caused O'Keefe's orbital fractures, getting Laposata to concede the basilar skull fracture alone could have caused those breaks. He questioned her characterization of the arm wounds, pressing her to count punctures she had described in her report. Brennan also established that Laposata never visited the scene, never reviewed vehicle data or speed information, never examined DNA or hair evidence from the vehicle, and had concluded the car did not strike O'Keefe before considering any vehicle-related evidence.

Procedural

Procedural - Motions

87 lines

Judge Cannone addressed two major evidentiary disputes during this sidebar. First, Brennan sought to impeach Dr. Laposata with a 2005 Rhode Island audit showing over 1,500 incomplete reports, her delayed response to the Station nightclub fire, a Patino case characterization, and the Tompkins case. Jackson defended Laposata, characterizing the audit as a political dispute over quality control protocols and noting the events were 25 years old. The court allowed cross-examination on the audit backlog and Station fire, excluded Tompkins because it had already been used to limit her testimony, and, after reviewing Patino over lunch, excluded that case from cross-examination unless redirect later opened the door and Brennan returned to sidebar. Second, Brennan raised extensive objections to Dr. Rentschler's updated PowerPoint, arguing that opinion slides were self-endorsing, bolstered the expert's credibility, contained hearsay, and that fabric-hole analysis exceeded Rentschler's biomechanical expertise. After the lunch recess, the court excluded all text-heavy opinion slides from Rentschler's presentation, stating the jury did not need written summaries to follow testimony.

Cross

Elizabeth Laposata Hank Brennan

244 lines

Hank Brennan resumed cross-examination of Dr. Elizabeth Laposata, pressing her credentials — she has not worked as a medical examiner since 2005, has not taken specialized brain injury courses since leaving, and last performed an autopsy four or five years ago. Brennan challenged her commitment to differential diagnosis by establishing she reached conclusions about the vehicle not striking O'Keefe before reviewing vehicle evidence. He questioned her about criticism received during the Station nightclub fire investigation and her subsequent resignation. On hypothermia, Laposata agreed as a general medical proposition that an immobile person in subfreezing conditions can lose body temperature and later die. She said the 98.6-to-80 calculation described how a dead body would cool and disagreed with applying the dead-body rate to a living person. Brennan also challenged her testimony on the nose scratch and eyelid injury, establishing she could not determine their cause and had not taken measurements of the Lexus spoiler height.

Redirect

Elizabeth Laposata Alan Jackson

51 lines

Alan Jackson conducted a brief redirect examination of Dr. Elizabeth Laposata addressing two topics raised during cross-examination. First, Jackson established that body cooling occurs at the same rates in any cold environment, whether indoors or outdoors — countering the prosecution's implication that cooling necessarily meant prolonged outdoor exposure. Second, Jackson introduced three X-ray exhibits (HH-229A, B, and C) of O'Keefe's right hand, forearm, and upper arm. Laposata walked the jury through each X-ray, confirming no fractures, microfractures, bone deformities, or abnormal soft tissue swelling anywhere in the right arm. The judge directed that the X-rays be provided to the jury on a flash drive rather than as large printouts.

+1 procedural segment

Direct

Andrew Rentschler Alan Jackson

245 lines

Dr. Andrew Rentschler, a biomechanical engineer and vice president at ARCCA, testified on direct examination by Alan Jackson about his qualifications and analysis of whether John O'Keefe's injuries were consistent with being struck by Karen Read's Lexus SUV. After establishing his extensive credentials — PhD in bioengineering, 17+ years at ARCCA, 150+ prior expert testimonies, and work with the U.S. military and NHL — Rentschler described O'Keefe's injuries: an occipital skull fracture, basilar skull fractures, subdural and subarachnoid hemorrhage, bilateral orbital ecchymosis, and superficial abrasions along the right arm. He testified that 1,400–1,600 pounds of force would be needed to produce the skull fracture, that head-form drop testing at 15 mph onto a tail light cover showed insufficient force, and that the body positioning required to strike only the head would necessarily produce cervical spine injuries that O'Keefe did not have. He also concluded the arm abrasions were inconsistent with tail light contact, noting he would expect fractures to the hand or forearm. Jackson then established that ARCCA was later retained by the defense for Trial 2 and provided additional materials including an Aperture report and PowerPoint by Dr. Judson Welcher. The proceeding was interrupted for the day before Rentschler could testify about the Aperture materials.

+1 procedural segment

◀ Day 29 Trial 2 Day 31 ▶

Day 30 - June 10, 2025

Procedural — Motions

Elizabeth Laposata — Direct (Part 2)

Elizabeth Laposata — Cross

Elizabeth Laposata — Redirect

Andrew Rentschler — Direct (Part 1)