The same issue arose at Read’s first trial: multiple jurors, in the wake of Cannone declaring a mistrial, reported to Read’s defense that they agreed to acquit her on two of the three counts, but they didn’t know they could return a partial verdict. That led to a lengthy appeals fight that was appealed to but not taken up by the U.S. Supreme Court.

Karen Read's fate in jurors' hands following month-long retrial with dramatic dashcam footage, expert testimony challenging vehicle collision theory, and powerful closing arguments.

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

The judge in the Karen Read retrial decided against telling jurors that they are allowed to return a split verdict on Tuesday — an issue raised shortly after her mistrial last year.

Karen Read's murder trial now rests with the jury, which appears focused on a drunken driving charge after prosecutors played clips of her discussing spiking her own drinks.