Prosecutors in the Karen Read case are requesting additional data from the defendant’s SUV that they argue would further bolster their case, pinpointing the vehicle’s “precise locations” the morning that former Boston police officer John O’Keefe died.

Hank Brennan, appointed as special prosecutor for Read’s second trial scheduled for late January, is requesting more testing be conducted on the defendant’s Lexus’ telematics system, which he said stores key evidence.

Brennan filed the request in Norfolk Superior Court last Friday.

Shanon Burgess, a digital forensic expert who’d perform the testing, “has opined that significant data was likely not acquired during the chip-off procedure,” last December, Brennan wrote in his filing.

The procedure, Brennan highlighted, is a digital data extraction that physically removes memory chips from a vehicle’s infotainment and telematics systems.

“Mr. Burgess, through his training and experience, believes the evidence acquired in the ‘chip-off’ was incomplete and that more data that was not acquired exists on the chips,” the prosecutor wrote.

Specifically, the request includes a review of the chips previously removed and a subsequent reattachment to the board in Read’s vehicle, and “updated programming and current software versions” would be used to “maximize the chances of a complete acquisition.”

Prosecutors are looking for track logs which they described as an “ordered sequence of GPS coordinate measurements stored by a satellite navigation system,” evidence that may be “exculpatory or inculpatory.”

The testing could also “potentially identify any Wi-Fi connections that would (be identified) by the vehicle as it traveled on its route,” Brennan wrote.

“The Commonwealth provided and introduced at trial video depicting some of the defendant’s travels on January 29, 2022,” he wrote in his request. “The additional data, likely to be retrievable would assist in identifying the precise locations that the defendant’s Lexus traveled from the time that the defendant struck and killed Mr. John O’Keefe until the time the vehicle was seized.”

Prosecutors say Read struck O’Keefe, a 16-year Boston Police officer, and her boyfriend of two years, with her SUV following a drunken argument and left him to die in a snowstorm.

O’Keefe died at the age of 46.

Defense attorneys counter that outside actors killed O’Keefe and conspired with state and local police to frame Read for his murder.

Massachusetts State Police Trooper Joe Paul, a collision specialist and crash reconstructionist, testified in the first trial that data he recovered from Read’s Lexus SUV and O’Keefe’s injuries were “consistent with a pedestrian strike.”

Paul also testified that while no data was recovered from the “airbag control module,” meaning it didn’t register a crash, that isn’t unusual for collisions with pedestrians.

“Striking a pedestrian isn’t going to change the velocity of the vehicle as quickly as two vehicles crashing,” he said.

Read’s defense team rested their case in the first trial after three witnesses, including two hired originally by the FBI, said the injuries sustained by O’Keefe and the damage to Read’s SUV were inconsistent with a pedestrian strike, regardless of other evidence.

Brennan, who was not involved with the first trial, requested a hearing within fourteen days to “permit prompt testing and production of relevant discovery.”

Read has pleaded not guilty and awaits retrial on charges of second-degree murder, manslaughter while operating a motor vehicle under the influence and leaving the scene of a fatal accident. Her two-month criminal trial ended in July when the judge declared a mistrial after jurors said they were deadlocked.