The Karen Read case returned to court Thursday as a defense expert was on the stand for more than six hours, just so a judge could determine whether or not she can testify at Read's second trial.Dog bite testimony in Karen Read caseNew special prosecutor Hank Brennan filed a motion recently asking Judge Beverly Cannone to exclude expert testimony about an alleged dog attack from Read's second criminal trial.

A hearing to determine whether the defense can use their preferred dog bite expert, Dr. Marie Russell, in the second trial of Karen Read took place in a marathon session that more resembled a

The judge in the Karen Read case on Thursday heard statements from a medical specialist to determine whether she’ll allow the physician to testify at a retrial that the wounds on John O’Keefe’s arm appeared to have been caused by a large dog.

Karen Read’s lawyers are pushing back on an effort to block one of their experts from taking the stand in her retrial in April.

At Read’s first trial, which ended with a hung hury, the medical expert told jurors that scratch marks on John O’Keefe’s arm appeared to come from a large dog.

The defense in the Karen Read case is fighting to have a dog bite expert testify in her retrial.Dr. Marie Russell<a class="excerpt-read-more" href=" More