Karen Read's second trial started today with opening statements and witness testimony in the high-profile Massachusetts murder case. Read, who is accused of hitting her Boston police officer boyfriend John O'Keefe with her SUV and leaving him to die in the snow in Canton in 2022,

Opening statements in Read’s murder trial will be held Tuesday, more than three years after O’Keefe’s death rocked the town of Canton and launched a sprawling legal saga that has since captured the nation.

Prosecutor says Read left her Boston police officer boyfriend "to die with no help" after drunkenly striking him with her car