Prosecutors want certain defense crash reconstruction experts excluded from testifying at Karen Read's retrial.

An expert hired by Karen Read ’s defense team was the subject of sharp cross-examination from a specially appointed prosecutor Tuesday as he sought to bar the expert from testifying at an upcoming trial to her belief that John O’Keefe’s injuries were caused by a dog attack before his death.

Prosecutors are aiming to chip away at Dr. Marie Russell's credibility and keep her off the witness list for Karen Read's retrial.

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.