'There was a lot of wincing': Expert witness' cross-examination, explained

A day of dense, scientific testimony in the Karen Read case took a dramatic turn as the defense called a prosecution expert's credentials into question — he confirmed a CV on his firm's site said he had a college degree that he hasn't gotten yet. Our experts, attorneys Michael Coyne and Peter Tragos, said it was a damaging moment for the prosecution. Here's why, how the jury appeared to react and what it could mean for other witnesses still to be called in the case.