DEDHAM, Mass. (WLNE) — Massachusetts State Police announced Monday that Trooper Michael Proctor has been relieved of duty following the mistrial of Karen Read.

Officials said Proctor, the lead investigator in the case, will officially be transferred from the criminal division of the Norfolk County District Attorney's Office.

Proctor, who was questioned about inappropriate text messages, had admitted to the jury that he had called Read numerous names, including “nutcase,” in text messages to friends, family and comrades.

“Our focus remains on providing police services at the highest level with professionalism and integrity,” Massachusetts State Police Colonel John Mawn said in a statement.

Police had previously launched an internal investigation after information about serious misconduct emerged during witness testimony at the trial, the statement said.

Authorities said that although Proctor is still employed by the department, the decision to relieve him of duty means he will not be able to work cases or serve as a police officer during that time.

Colonel Mawn made the following statement regarding the mistrial:

“Following the mistrial in Commonwealth v. Karen Read, the Massachusetts State Police would like to extend its condolences again to the family of Boston Police Officer John O'Keefe. We cannot imagine how much this outcome has added to the immense grief, sorrow and sense of loss felt by the O'Keefe family. John served honorably throughout his life – both to the city of Boston and to the children entrusted to his care following the unexpected deaths of his sister and brother-in-law. He will be remembered with utmost respect.”

Read is accused of killing O'Keefe by hitting him with her SUV and leaving him in front of a Canton home in a snowstorm in January 2022.

The Norfolk County District Attorney announced Monday that the Commonwealth plans to retry the case.