A retired California-based doctor who testified as an expert witness for the defense in Karen Read's first trial will be back on the stand Tuesday. Prosecutors are trying to exclude future testimony from Dr.

A hearing is being held Tuesday morning in the Karen Read case ahead of her second trial later this year. The hearing started at 9 a.m. in Norfolk Superior Court. You can watch it live in the video player above.

Dr. Marie Russell previously testified that the holes found in John O’Keefe’s hoodie and the wounds to his arm were from a dog.