An attorney for Karen Read has asked the highest court in Massachusetts to dismiss a murder charge and one other charge she faces in the death of her Boston police officer boyfriend.

Karen Read’s lawyers said the trial judge made crucial errors in her declaration of a mistrial in the murder case and in dealing with jurors’ post-trial disclosures that they were ready to acquit

This issue is one of existential importance — not merely to Ms. Read, but to the very foundation of the constitutional safeguards that protect her,” Read's lawyers wrote.

Attorneys for Karen Read filed a 77-page brief with the state's highest court on Wednesday, arguing that the state’s continued push to retry her would amount to unconstitutional double jeopardy.

An attorney for Karen Reed have asked the Massachusetts Supreme Judicial Court to a murder charge she faces in the 2022 death of her boyfriend, Boston Police officer John O’Keefe.