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.

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.

A broken taillight. A dead cop. A bombshell admission. The jury is now deliberating over whether Karen Read killed John O'Keefe.

The Karen Read trial is back in a Massachusetts courtroom today for a full day of testimony from defense witnesses. The first witness called was Daniel Wolfe, a crash reconstructionist for engineering consulting firm ARCCA.

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

During testimony in Karen Read's murder trial, Brian Loughran described driving a plow truck past 34 Fairview Road in a blizzard and noted a parked Ford Edge SUV not usually seen there.

Tuesday marks Day 30 of witness testimony in Read’s second trial. Attorneys are expected to argue motions, including what the defense’s next ARCCA witness will be allowed to testify before Dr. Elizabeth Laposata returns to the stand.

Karen Read's attorneys could call their final witness on Tuesday as the high-profile Massachusetts case enters its final days.

The defense expert described his own testing methods, which included the use of a crash-dummy arm, calling it "the gold standard" for such analyses.