Karen Read’s defense called its first witness on Friday, marking a new phase in her retrial in the killing of John O’Keefe, her off-duty Boston police officer boyfriend whose body was found buried in the snow outside a home in Canton,

The Massachusetts woman who says she was framed for the death of her boyfriend, Boston Police Officer John O'Keefe, hired two high-profile Los Angeles attorneys to lead her defense

The first witness called by Karen Read's defense explained that there were few scenarios where John O'Keefe's phone locked before Read's car accelerated in reverse.