“I don’t believe that’s consistent with the evidence and what occurred,” Rentschler replied. Rentschler was the final defense witness, just as he was during Read’s first trial last summer. After he left the stand, Jackson announced Read’s defense would rest its case subject to a final ruling on evidence.

Karen Read's defense concluded with expert witness Dr. Andrew Rentschler testifying that Boston cop John O'Keefe's injuries were inconsistent with being struck by Read's SUV.

The Karen Read trial on Friday focused on controversial testimony about the alleged collision involving Read's SUV and John O'Keefe. The only witness on the stand all day was Daniel Wolfe, a crash reconstructionist for engineering consulting firm ARCCA.

For weeks, all appearances were that prosecutors would call witnesses as part of a brief rebuttal case in the Karen Read retrial, giving them the opportunity to get the last word after damaging testimony from expert witnesses for the defense.

The Karen Read defense rested its case after testimony from their final witness who reiterated his opinion that the evidence does not support the prosecution’s theory that a vehicle strike

For the second time in a week, Judge Beverly Cannone denied Karen Read's attorneys' request for a mistrial after they accused the prosecution of misconduct.

It took eight weeks and dozens of witnesses, but on Friday, Karen Read's retrial shifted to its most critical phase: jury deliberations.

Murder trial of Karen Read in the death of her former boyfriend, Boston police officer John O'Keefe, approaches final stage with closing arguments set after extensive testimony.

Karen Read's defense rested its case Wednesday after a crash expert said that he does not believe John O'Keefe was hit by a vehicle.

Karen Read's defense rested its case Wednesday after biomechanist Andrew Rentschler from ARCCA finished testifying that in his opinion, John O'Keefe was not hit by a vehicle. WBZ-TV's Brandon Truitt reports.