Karen Read's defense team challenges murder allegations in the death of Boston Police Officer John O'Keefe, as the prosecution rests its case with key testimony.

The prosecution is resting its case in Karen Read’s second murder trial after a battery of witnesses and presentation of new evidence.

Critical evidence that was logged a month after police collected it. Defense lawyers at the trial of Karen Read – a Massachusetts woman accused of hitting her cop boyfriend with her SUV and leaving him for dead – are aggressively going after evidence being used against the 45-year-old woman.

The digital evidence in Karen Read's retrial, including John O'Keefe's last movements, is examined by Vinnie Politan.