The prosecutor in the Karen Read case said Tuesday that the federal investigation into John O'Keefe's death is over.

The Karen Read defense team mounted two efforts on Wednesday to have at least two charges — if not the whole case — against her tossed with less than one month to go before the Mansfield woman is scheduled to be retried for the murder of Boston cop John O’Keefe.

The Karen Read case is the subject of two hearings in separate courthouses on Wednesday. First, Read appealed a recent decision by the Massachusetts Supreme Judicial Court at federal court in South Boston.