DEDHAM, Mass. —

Testimony continues Wednesday after the defense team in the Karen Read retrial demanded a mistrial after the prosecution questioned a witness about dog DNA.

Read, 45, of Mansfield, a former adjunct professor at Bentley University, has pleaded not guilty to second-degree murder and other charges in connection with the death of John O'Keefe, her boyfriend and a Boston police officer. Prosecutors allege that Read hit O'Keefe with her SUV during a snowstorm on Jan. 29, 2022, following a night of drinking . Her first trial ended with a hung jury.

Video: Question about dog DNA prompts request for mistrial

Outside court on Tuesday, Read was asked again if she might still testify.

"I'm ambivalent. And by ambivalent, I could get on board with either one. I could feel stro

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