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.

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.

Biomechanical engineer testifies injuries inconsistent with taillight impact in Karen Read murder case, after judge interrupts his birthday message.

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.

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

Read’s lawyers again asked Judge Beverly Cannone to issue a finding of not guilty before the case even gets to the jury.

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