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,

A new court filing by Karen Read’s defense team could indicate she will not testify in her retrial for the January 2022 killing of her boyfriend, Boston police officer John O’Keefe, as questions swirl about whether she will take the stand in the case’s waning days.