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.

After the defense wrapped up its questioning of Rentschler, Prosecutor Hank Brennan told the judge he did not plan to call any more witnesses, reversing an earlier request to recall a different crash expert. The lawyers agreed to begin their closing arguments at 9 a.m. Friday. They'll then hand the case to the jury.