I have confirmed that not only was Lt. John Fanning in charge of overseeing the jury in the Karen Read murder trial, he was also the source who reported a juror and had her eliminated on the final day of the trial.
https://tbdailynews.com/canton-coverup-part-387-conflicted-state-police-lt-john-fanning-was-in-charge-of-eliminating-juror-who-intended-to-acquit-karen-read/