What to know before Karen Read’s second murder trial

Karen Read will face a second trial beginning Tuesday after all her attempts to throw the charges out have failed.
Here’s what you need to know before it all begins. The Herald also has a guide to who’s who in the retrial.
Read, 45, is accused of striking John O’Keefe, her boyfriend of two years and a 16-year Boston Police officer, with her car and leaving him to die in a major snowstorm on the front lawn of 34 Fairview Road in Canton on Jan. 29, 2022.
She was tried last year o