Karen Read's second trial is set to begin on Tuesday, after her first trial ended in a mistrial with the jury unable to reach a verdict.

The retrial of Karen Read has begun, less than a year after a judge declared a mistrial on charges that she was responsible for the death of her Boston police officer boyfriend.

Selecting an unbiased jury in a criminal case is always a tricky process. But that task will be particularly difficult Tuesday in the second murder trial of Karen Read.