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Prosecutors Ready to Close Case as Crash Expert Details Throttle Data in Karen Read Retrial

Welcher’s analysis linking vehicle data to O’Keefe’s final phone timestamps foreshadows an intensive defense cross-examination

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Overview

  • Dr. Judson Welcher testified that data from Read’s SUV showed 74% throttle during a 53-foot reverse maneuver, with timestamps matching John O’Keefe’s phone records.
  • Special prosecutor Hank Brennan is expected to rest the prosecution’s case after Welcher’s testimony, paving the way for Read’s defense team to present its witnesses.
  • Brennan has woven clips of Read’s past media interviews into courtroom proceedings to highlight discrepancies in her statements and suggest calculated intent.
  • Defense attorney Robert Alessi has challenged Welcher on revisions to his PowerPoint presentation and the introduction of new vehicle data sourced from Massachusetts State Police.
  • Read’s first trial ended in a hung jury in 2024 and ongoing defense arguments have questioned investigation integrity, including bias revealed in texts from former state trooper Michael Proctor.