People

Judge Beverly J. Cannone presided over both Karen Read criminal trials in Norfolk County Superior Court, overseeing the 2024 mistrial and the 2025 mixed verdict: acquittals on murder and leaving the scene, and an OUI conviction.

Adam Lally led the Commonwealth's prosecution in Trial 1 and remained on the prosecution team in the retrial, delivering the first trial's opening and examining witnesses in both trials.

Special ADA Hank Brennan led the Commonwealth's case in Trial 2, delivering the prosecution's opening statement and examining the bulk of the government's witnesses across all phases of the trial.

Alan Jackson is a criminal defense attorney and partner at Werksman Jackson & Quinn LLP who served as lead cross-examiner for Karen Read across both trials.

David Yannetti is one of Karen Read's lead defense attorneys, who delivered the defense's opening statement and conducted cross-examinations of witnesses central to the cover-up theory across both trials.

Robert Alessi is a defense attorney in Karen Read's second trial, specializing in the cross-examination of prosecution expert witnesses on digital forensics, forensic science, and accident reconstruction.

Elizabeth Little is a defense attorney who represented Karen Read in both trials and examined expert and lay witnesses.

Jennifer McCabe is Nicole Albert's sister and a key prosecution witness who was present the night John O'Keefe disappeared and helped discover his body the following morning.

ATF agent Brian Higgins was present at 34 Fairview Road on the night of John O'Keefe's death and engaged in extensive text communications with Karen Read, making him a central witness to disputed facts about the timeline and social dynamics of that evening.

Boston Police sergeant detective and homeowner of 34 Fairview Road, where John O'Keefe's body was found on January 29, 2022.

Kerry Roberts, a longtime friend of John O'Keefe, was one of three people present when O'Keefe's body was discovered on Fairview Road and a key eyewitness to Karen Read's behavior that morning.

Massachusetts State Police forensic scientist who examined Karen Read's Lexus SUV and John O'Keefe's clothing for biological and trace evidence in both trials.

Matthew McCabe, husband of Jennifer McCabe, was part of the group at 34 Fairview Road on the night of January 28-29, 2022, and testified about his observations of a dark SUV as it changed position outside the Albert residence.

Canton DPW snowplow driver Brian Loughran testified in both trials that he observed the front lawn of 34 Fairview Road multiple times in the early morning hours of January 29, 2022, and saw no body during any pass before police blocked the road.

Canton firefighter-paramedic Tim Nuttall was among the first responders to arrive at 34 Fairview Road on January 29, 2022, and testified that Karen Read repeatedly said 'I hit him' at the scene.

Canton firefighter-paramedic Katie McLaughlin responded to the scene where John O'Keefe was found and is a key prosecution witness for her account of Karen Read repeatedly stating 'I hit him.'

Colin Albert, nephew of Brian Albert, testified about his movements at 34 Fairview Road on the night John O'Keefe died, placing himself at the house until approximately 12:10 a.m.

Julie Albert is the wife of Christopher Albert and mother of Colin Albert, both connected to the Albert family household where John O'Keefe was found dead. She testified about the group's activities at the Waterfall bar and her discovery of the scene at 34 Fairview Road the following morning.

Chris Albert is Brian Albert's brother, a longtime Canton resident and later town selectman, and a friend of John O'Keefe who testified about seeing O'Keefe at the Waterfall on January 28, 2022.

Sarah Levinson was a friend of Brian Albert Jr. who attended his birthday party at 34 Fairview Road on the night of January 28-29, 2022, and departed through the front door around 2 AM — walking past the area where O'Keefe's body was later found.

Ryan Nagel is a civilian witness who arrived at 34 Fairview Road around 12:30 a.m. on January 29, 2022, to pick up his sister Julie and observed a woman sitting in the driver's seat of a black SUV parked in front of the Albert house.

Michael Camerano, a longtime friend of John O'Keefe, spent the evening of January 28, 2022 with him at C.F. McCarthy's and testified that he woke to missed calls and drove to O'Keefe's house the following morning to pick up O'Keefe's niece.

Canton paramedic Daniel Whitley transported Karen Read to Good Samaritan Hospital under a Section 12 psychiatric hold on the morning John O'Keefe's body was found, and his account of her statements during that ride became central prosecution evidence.

Julie Nagel was a guest at the Brian Albert Jr. birthday party on the night of January 28–29, 2022, who testified that she observed a dark, body-sized object near the flagpole on the Albert front lawn as she was leaving.

Canton firefighter and paramedic Anthony Flematti was the lead first responder at 34 Fairview Road on January 29, 2022, and testified that Karen Read repeatedly told him 'I hit him' at the scene.

Nicole Albert is Brian Albert's wife and co-owner of 34 Fairview Road, who testified about the group's movements on the night of January 28-29, 2022 and the discovery of John O'Keefe's body the following morning.

Allison McCabe is Colin Albert's cousin and close friend who testified about picking him up from 34 Fairview Road around midnight on January 28-29, 2022, and her observations of his condition at that time.

Caitlin Albert, Brian Albert's eldest daughter, testified about the gathering at 34 Fairview Road on the night John O'Keefe died and said that neither O'Keefe nor Karen Read entered the house.

Karina Kolokithas is a witness who was present at the Waterfall Bar & Grille on the night of January 28, 2022, observing Karen Read and John O'Keefe in the hours before his death.

Heather Maxon is a bystander who arrived at 34 Fairview Road the same night as Karen Read and John O'Keefe, testifying about observing an SUV parked outside the Albert home with a female driver and male passenger.

Brian Albert Jr. is the son of Brian Albert Sr. and was celebrating his 23rd birthday at 34 Fairview Road on the night John O'Keefe died. He testified in Trial 1 about the gathering and what he observed that evening.

Paul O'Keefe is the brother of victim John O'Keefe and testified in Trial 1 about his family, the couple's relationship, and what he witnessed at the hospital on January 29, 2022.

Tristin Morris, boyfriend of Caitlin Albert, testified about picking her up from 34 Fairview Road in the early morning hours of January 29, 2022, and observing nothing unusual on the front lawn.

Ricky D'Antuono was a bystander who drove to 34 Fairview Road around midnight on January 29, 2022, and briefly observed a black SUV parked outside the Albert household.

Jonathan Diamandis, a longtime friend of Michael Proctor, testified in Trial 2 about a group text chain among Proctor and other childhood friends. He identified Proctor as 'local user' in the records and said he had no independent memory of the conversations.

Canton firefighter-paramedic Matthew Kelly was among the first responders to arrive at 34 Fairview Road and treated John O'Keefe at the scene.

Nicholas Kolokithas is a Canton attorney and basketball parent who was with the group at the Waterfall bar on the night of January 28, 2022, and testified about the evening's events and the couple's demeanor.

Canton firefighter paramedic Jason Becker responded to Karen Read's Section 12 psychiatric evaluation call on January 29, 2022, and transported her to the hospital, during which she made statements about potentially hitting John O'Keefe.

MSP Trooper Connor Keefe was a digital forensic examiner and homicide unit trooper who collected phones and physical evidence at 34 Fairview Road on January 29, 2022.

Curt Roberts is a friend of John O'Keefe who socialized with him at CF McCarthy's bar the night before his death and testified about the group's demeanor and the frantic early-morning call from Karen Read.

Erin O'Keefe is John O'Keefe's sister-in-law who testified about Karen Read's statements and behavior in the hours after John's death was discovered.

Katie Camerano was a family friend of John O'Keefe who testified about the frantic early-morning phone calls and texts she received from Karen Read on January 29, 2022.

Rebecca Trayers is an 11-year veteran Canton bartender who served the Albert-O'Keefe group at the Waterfall Bar & Grille on the night of January 28, 2022.

Canton Fire Lt. Greg Woodbury responded to 34 Fairview Road, assisted with John O'Keefe's care, conducted a secondary survey in the ambulance, and later helped transport Karen Read under a Section 12 hold.

Laura Sullivan, a friend of John O'Keefe connected through their mutual friend Pat Rogers, testified about O'Keefe's relationship with Karen Read during the New Year's 2021-2022 Aruba group trip.

Marietta Sullivan was a close family friend of John O'Keefe who testified about a hostile confrontation with Karen Read during a New Year's trip to Aruba in late 2021.

John Tedman is a private investigator with Forum Investigations who was retained by the defense days before testifying to measure and photograph the entrances at 34 Fairview Road.

Canton Fire Lt. Frank Walsh was the first paramedic to reach John O'Keefe on the morning of January 29, 2022, and documented the injuries and scene conditions at 34 Fairview Road.

Margaret O'Keefe is John O'Keefe's mother, who testified in Trial 2 about learning of her son's death and her interactions with Karen Read at the hospital and afterward.

MSP Crime Scene Services Trooper Evan Brent photographed the evidence scene at 34 Fairview Road and Karen Read's Chevrolet Traverse on February 3, 2022, five days after John O'Keefe's death.

Canton DPW superintendent Michael Trotta testified about snowplow operations on Fairview Road during the January 28-29, 2022 blizzard, and the limited scope of Trooper Proctor's investigation into those operations.

Dr. Daniel Wolfe is an accident-reconstruction engineer at ARCCA Inc. who testified in Trial 1 after a DOJ/FBI retention and in Trial 2 after the defense retained him, addressing whether the Lexus tail-light damage was consistent with striking a pedestrian.

Dr. Marie Russell is a retired emergency physician and forensic pathologist who testified as a defense expert in both trials, offering the opinion that John O'Keefe's arm injuries were caused by a large dog attack rather than a vehicle strike.

Shanon Burgess is a digital forensics expert retained by the prosecution who testified about recovering previously missed data from Karen Read's Lexus infotainment SD card, establishing vehicle power timestamps and clock variance relative to John O'Keefe's iPhone.

Judson Welcher is a forensic engineer and accident reconstructionist with Aperture LLC who testified in Trial 2 that the Lexus data and damage were consistent with a collision, with tail-light damage consistent if the impact exceeded approximately 8 mph, and that O'Keefe's injuries were consistent with being struck by a physically identical Lexus and contacting frozen ground. The court ruled that he could not testify that Read's specific Lexus collided with O'Keefe.

Ian Whiffin is a Cellebrite digital-forensics expert who testified in Trial 1 about Jennifer McCabe's Google-search timing and in Trial 2 about that issue and John O'Keefe's phone data.

Dr. Andrew Rentschler is a biomechanical engineer and accident reconstructionist from ARCCA Inc. who testified as a defense expert in both trials, arguing that John O'Keefe's injuries are inconsistent with being struck by Karen Read's Lexus tail light.

Massachusetts State Police digital forensics trooper who extracted and analyzed phone data from multiple devices central to the case, including O'Keefe's, Read's, and Jennifer McCabe's phones.

Dr. Irini Scordi-Bello is the Norfolk County medical examiner who performed John O'Keefe's autopsy and determined his cause of death as blunt impact injuries of the head and hypothermia, with manner of death undetermined.

Dr. Elizabeth Laposata is a forensic pathologist and former Rhode Island Chief Medical Examiner called by the defense in Trial 2 to contest the cause and manner of John O'Keefe's death.

Matthew DiSogra is a defense forensic expert who testified in Trial 2 to critique the prosecution's clock alignment analysis of Karen Read's Lexus vehicle data.

Ashley Vallier is a forensic scientist at the Massachusetts State Police Crime Lab who performed physical match analysis linking tail light fragments found at 34 Fairview Road to Karen Read's vehicle.

Jessica Hyde is a digital forensics expert from Magnet Forensics who testified for the prosecution in both trials about the timing of the 'how long to die in cold' Google search on Jennifer McCabe's phone.

Christina Hanley is a forensic scientist at the Massachusetts State Police Crime Lab who testified about glass and plastic trace evidence comparisons involving debris from the scene and Karen Read's vehicle, including comparisons of plastic debris from John O'Keefe's clothing with sampled tail-light plastic; she said the clothing plastic was consistent in specified properties with the sampled tail-light plastic but could have come from another source with the same characteristics.

Andre Porto is a forensic scientist at the Massachusetts State Police Crime Lab who testified about DNA analysis performed on evidence items in the Karen Read case.

Richard Green is the defense's digital forensics expert in Trial 1, testifying about the timing of Jennifer McCabe's 'how long to die in cold' Google search and the deletion of call records on McCabe's phone.

Nicholas Bradford is a DNA analyst from BODE Technology who testified about DNA evidence found on Karen Read's vehicle tail light, presenting statistical results linking John O'Keefe's DNA to the evidence.

Hannah Knowles is an MSP Crime Lab toxicologist who testified in Trial 2 about converting Karen Read's hospital blood test into an estimate of 0.14–0.28% BAC at 12:45 a.m., the time she believed was specified in the district attorney's request.

Robert Gilman is a meteorologist with 45+ years of experience who testified about the weather conditions in Canton, MA during the early morning hours of January 29, 2022, when John O'Keefe's body was found.

UC Davis forensic scientist who testified that DNA testing of swabs from a shirt found no canine DNA and only pig DNA; she said the source was undetermined and that food was one possible source.

Dr. Gary Faller, chief pathologist at Good Samaritan Medical Center during Trial 1 and at Signature Healthcare by Trial 2, testified about Karen Read's hospital serum alcohol result and the laboratory's testing procedures.

Defense forensic pathologist who testified that John O'Keefe's arm injuries were consistent with an animal attack rather than a vehicle strike, and that his fatal head injury rendered him immediately unconscious.

Nicholas Roberts is a forensic toxicologist from the Massachusetts Toxicology Lab who testified for the prosecution in Trial 1, performing retrograde extrapolation to estimate Karen Read's BAC at the time of the incident.

Emergency physician at Good Samaritan Medical Center who treated John O'Keefe on the morning of January 29, 2022, and declared his death at 7:50 a.m.

Dr. Aizik L. Wolf is a neurosurgeon called by the prosecution in Trial 2 to testify about the nature of John O'Keefe's fatal head injuries.

Carl Miyasako is a DNA analyst who testified for the prosecution about mitochondrial DNA testing on a hair found on Karen Read's vehicle, concluding John O'Keefe could not be excluded as the source.

Tess Chart is a DNA analyst at Bode Technology who testified in Trial 1 about mitochondrial DNA testing linking a hair sample to John O'Keefe.

Dr. Renee Stonebridge is a Norfolk County neuropathologist who testified about the acute traumatic brain injuries found during John O'Keefe's autopsy.

Massachusetts State Police Sergeant Yuri Bukhenik was the lead supervisor on the Karen Read investigation, overseeing evidence collection, witness interviews, and the chain of custody from January 29, 2022 onward.

Michael Proctor was the Massachusetts State Police case officer in the O'Keefe death investigation; the defense cited his personal text messages in arguing that he was biased against Karen Read.

Lt. Paul Gallagher of Canton PD was among the first officers at the scene where John O'Keefe was found, and his evidence collection methods became a central focus of the defense's contamination arguments in both trials.

MSP crash reconstructionist who testified that vehicle data from Karen Read's Lexus is consistent with striking John O'Keefe while reversing at 24 mph on Fairview Road.

Det. Lt. Brian Tully of the Massachusetts State Police served as the investigation's supervising officer, presenting the prosecution's core surveillance and cell site evidence against Karen Read.

MSP SERT Lieutenant Kevin O'Hara led the specialized evidence search at 34 Fairview Road on January 29, 2022, where the team recovered taillight fragments and a sneaker during blizzard conditions.

Canton PD Sergeant Michael Lank responded to 34 Fairview Road on January 29, 2022, and testified about the scene response and discovery of taillight plastic — while facing extensive defense questioning about his personal ties to the Albert family.

Canton PD Sergeant Sean Goode was the overnight shift supervisor who received the 911 call and responded to 34 Fairview Road on the morning John O'Keefe was found.

Canton PD Officer Steven Saraf was the first responding officer to reach John O'Keefe's body at 34 Fairview Road on the morning of January 29, 2022.

Dighton Police Sergeant Nicholas Barros assisted state troopers in retrieving Karen Read's Lexus on January 29, 2022, and testified that the vehicle's tail light was less damaged when he observed it than photographs taken later show.

Boston Police Officer Kelly Dever testified as a defense witness in Trial 2 about her observations from the Canton PD dispatch room on the night of John O'Keefe's death, and about a prior statement she later recanted placing Brian Higgins and Chief Berkowitz alone with the evidence vehicle.

Canton PD Officer Steven Mullaney was one of the first officers to arrive at 34 Fairview Road on January 29, 2022, and witnessed both the discovery of John O'Keefe's body and Karen Read's behavior at the scene.

Lt. Charles Rae was a Canton PD patrol shift commander who conducted a well-being check at John O'Keefe's residence on the morning of January 29, 2022.

MSP Sergeant Zachary Clark testified about his crime scene documentation of Karen Read's vehicle and the 34 Fairview Road scene on February 1, 2022.

Sgt. J. Ryan Gallerani of the Needham Police Department testified about collecting DNA reference samples from Michael Proctor and Yuri Bukhenik.