A key witness in the Karen Read retrial takes the stand for a second day of testimony. Here’s what we’ve learned so far

A key witness in the retrial of Karen Read returned to the stand Wednesday for a second day of testimony, as she recounts the hours leading up to the death of Read’s boyfriend John O’Keefe – and the moment the off-duty Boston police officer’s body was found lying in the snow.

​ A key witness in the retrial of Karen Read returned to the stand Wednesday for a second day of testimony, as she recounts the hours leading up to the death of Read’s boyfriend John O’Keefe – and the moment the off-duty Boston police officer’s body was found lying in the snow. Read More Breaking News, Latest News and Videos | CNN