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.

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.

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

Both sides in Karen Read’s murder retrial appeared in court Thursday for a hearing before they deliver closing arguments to jurors on Friday. The hearing is known as a charge conference, where the parties hash out instructions the jury will receive before they start deliberating. Jurors weren’t present for Thursday’s proceedings.

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.

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 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.

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.

An ARCCA crash reconstruction expert was back on the stand Wednesday in the Karen Read murder retrial.Dr. Andrew Rentschler testified about<a class="excerpt-read-more" href=" More

Crash reconstructionist returns to stand in Karen Read's murder retrial as judge weighs additional expert testimony about injuries that killed John O'Keefe