Karen Read trial | Key defense witness quizzed on dog bite expertise

Prosecutors in the Karen Read trial spent the day in court trying to discredit the expertise of the defense’s dog bite expert, Dr. Marie Russell, so she can’t testify in the retrial. Follow NBC10 Boston: https://instagram.com/nbc10boston https://tiktok.com/@nbc10boston https://facebook.com/NBC10Boston https://twitter.com/NBC10Boston