Dr. Marie Russell, a key defense witness, testified Monday she believes John O’Keefe’s arm injuries “were inflicted as the result of a dog attack.” The post Livestream: Karen Read’s dog bite expert back on the stand appeared first on Boston.

Karen Read's attorney asked for a mistrial with prejudice, accusing the prosecution of acting improperly, but the request was denied.

Karen Read murder trial Judge Beverly Cannone rejected the defense's motions for a mistrial Tuesday. State of play: Defense expert Marie Russell testified the wounds on victim John O'Keefe's body came from dog bites and not a vehicle impact as prosecutors allege.