A Massachusetts woman is asking the state’s highest court to dismiss some of the charges against her after her murder trial in the death of her police officer boyfriend ended in a mistrial amid emerging allegations of a corrupt cover-up involving their own colleagues.

Karen Read, a 44-year-old former finance professional, was dating John O’Keefe, a 46-year-old Boston police officer found dead in the front yard of another Boston police officer in Canton the morning after an Easter holiday. northeast in January. 2022.

The criminal case against her ended in a mistrial after jurors deadlocked after 26 hours of deliberation, but prosecutors now plan to try her again early next year.

Prosecutors allege she ran him over with her truck during a drunken fight and then drove off, leaving him injured but alive until he froze to death.

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After the jury was dismissed for the day, Karen Read, right, listens as defense attorney Alan Jackson questions Canton Police Sergeant Michael Lank. (Pat Greenhouse/The Boston Globe via Getty Images)

she appeared before the Massachusetts Supreme Judicial Court on Wednesday to argue that two of the three counts in his first trial should be dropped under a constitutional ban on double jeopardy, because jurors had only deadlocked in the third.

“Today’s appeal addresses the central issues relating to the double jeopardy protection that safeguards defendants, in this case Ms. Read, from the risk of retrial for the same crimes for which a previous jury was acquitted,” the judge said. Read’s attorney, Martin Weinberg, at a news conference. panel of judges from the state’s highest court, according to The Associated Press.

Officer John O’Keefe poses for his official headshot. O’Keefe’s girlfriend, Karen Reed, has been charged with murder after he was found dead outside a Massachusetts home in January 2022. (Boston Police Department)

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Weinberg said several jurors came forward after the mistrial to say they had deadlocked on the involuntary manslaughter charge, but believed Read was not guilty of second degree murder and leaving the scene of a fatal accident.

However, they had not told the judge.

He asked that jurors be brought in to testify on the matter. The panel did not announce a decision Wednesday.

Hundreds of Karen Read supporters gather outside the Norfolk County Superior Court before one of her appearances. (Matt Stone/MediaNews Group/Boston Herald via Getty Images)

Read has maintained that he dropped O’Keefe at Boston Police Officer Brian Albert’s home on a snowy night and went home after a night on the town with friends.

Early the next morning, realizing that he had not returned, she went to look for him with her friends. They found his body in the snow on Albert’s lawn.

Karen Read’s defense holds a sign containing information they believe exonerates their client of the murder of John O’Keefe. (John Tlumacki/The Boston Globe via Getty Images)

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Read has argued that she was framed by the real killers, who she believes are other members of law enforcement who attacked O’Keefe inside Albert’s house and then threw him outside into the storm. None of those officers have been charged with any crime.

Karen Read arrives at Norfolk Superior Court for a hearing to dismiss murder charges against her. (John Tlumacki/The Boston Globe via Getty Images)

The medical examiner found that O’Keefe died from blunt force trauma to the head and hypothermia.

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The Associated Press contributed to this report.