Defense attorneys for Karen Read rested their case Wednesday, bringing her retrial for the death of her Boston police officer boyfriend one step closer to its blockbuster conclusion.

Will Karen Read walk free after three years, two trials, and several weeks of testimony? Or will she end up behind bars?

Karen Read's defense rested its case after a biomechanical engineer told jurors John O'Keefe's injuries were inconsistent with a car crash.

A Massachusetts jury has begun deliberating in Karen Read's second murder trial over the killing of her police officer boyfriend.

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.

Special prosecutor Hank Brennan admits evidence mistake in Karen Read's murder retrial as defense requests mistrial, with legal experts divided on whether the error was intentional

After nearly two months of testimony, Karen Read’s retrial for the murder of her boyfriend John O’Keefe is in its final days. The defense has now rested its case, without Read taking the stand. NBC News’ Emilie Ikeda reports.

We talked to three defense attorneys about retrials they've seen, how they turn out and what they think of the Karen Read murder case.