The federal investigation in the Karen Read case is closed, and no charges will be filed against police. 

Read is accused of hitting her boyfriend, Boston Police Officer John O'Keefe, with her SUV outside a house in Canton in January, 2022, and leaving him to die in snowstorm. 

Her defense has long maintained the 44-year-old Mansfield woman was framed and that other police officers were responsible for O'Keefe's death. 

Read's first trial ended with a mistrial last July, and her second trial is scheduled to start April first.