Norfolk Superior Court Judge Beverly Cannone is sitting tight on deciding whether Karen Read’s defense can use its preferred dog bite expert in her second trial scheduled to begin in April. After yet another marathon hearing to determine the fate of Dr.

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.

In a series of motions filed over the last few weeks in preparation for Karen Read's second trial, prosecutors have told the court they want certain defense crash reconstruction experts excluded from testifying again.

A pair of accident reconstructionists told jurors during Karen Read's first trial that John O'Keefe's injuries weren't consistent with a car crash. Prosecutors now want to prevent them from testifying during Read's second trial.

Prosecutors in the Karen Read case are asking a judge to exclude testimony from the defense team's digital expert, Richard Green.

A dog bite expert was back on the stand Tuesday morning as the high-profile Karen Read murder case returned to court for another pre-retrial hearing.

The Karen Read case continues with Dr. Marie Russell on the stand. The defense wants her to be an expert witness again on dog bites.

The defense wants Dr. Marie Russell to be an expert witness again on dog bites. WBZ-TV's Kristina Rex reports.