Key witness Jennifer McCabe testifies Karen Read said 'I hit him' three times after finding John O'Keefe's body. Defense challenges inconsistencies in her account to grand jury.

Karen Read 's second murder trial is now underway. But this trial is not it for Read's legal troubles. Read, 45, is accused of killing her boyfriend, Braintree native and Boston police officer John O'Keefe outside a Canton home in January 2022. Read's first trial in O'Keefe's death ended in a mistrial in July.

Jackson pressed McCabe on her testimony from the first trial about the last time she saw Read’s SUV and when she noticed it was gone. McCabe said she could not remember the specific times. “At a bare minimum, you were at the door looking out the window ... four times, correct?” Jackson asked.