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Judge Denies Mistrial in Karen Read’s Second Murder Retrial

Defense highlights alleged investigator bias to undermine prosecution’s crash reconstruction evidence

Karen Read speaks with her attorney Alan Jackson during her murder trial in Norfolk Superior Court in Dedham, Massachusetts on Friday, May 30, 2025.
Michael Proctor, right, takes the stand to testif in Karen Read's first trial in June 2024.
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Overview

  • Judge Beverly Cannone refused to declare a mistrial after prosecutors questioned defense expert Dr. Marie Russell about the absence of dog DNA on John O’Keefe’s sweatshirt.
  • Dr. Marie Russell testified that scratch marks on O’Keefe’s arm were consistent with a dog attack despite admitting she was unaware of DNA results when forming her opinion.
  • Crash reconstruction expert Matthew DiSogra challenged the prosecution’s clock-synchronization analysis, warning that isolating a single timestamp cannot conclusively link Read’s SUV to O’Keefe’s cellphone movements.
  • Jonathan Diamandis described sexist text messages sent by former lead investigator Michael Proctor, and jurors reviewed messages in which Proctor disparaged Read and discussed premature conclusions.
  • After prosecutors played clips from her televised interviews, Read’s defense opted not to call her to testify, preserving her right to remain silent.