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.

Legal analyst Katherine Loftus talked about how Jennifer McCabe's testimony in Karen Read's trial has been different from the first time.

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.