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.

Jurors in the Karen Read trial had their first full day of deliberations Monday in the high-profile case, but did not reach a verdict. Read is facing trial for a second time in the death of her boyfriend, Boston police officer John O'Keefe.

Read, 45, has pleaded not guilty to second-degree murder, manslaughter while operating under the influence, and leaving the scene of a crash resulting in death.