A Certain Justice is an Adam Dalgliesh novel by P. D. James, published in 1997. Venetia Aldridge is a brilliant criminal lawyer who is set to take over as the Head of Chambers in Pawlet Court, London. She successfully defends Garry Ashe against the charge of the murder of his aunt but is unprepared when her daughter flaunts her emotional involvement with him. Venetia is murdered in her office soon after her trial. Adam Dalgliesh investigates what appears to be an inside job. Things are not as simple as they seem as all the suspects appear to have unbreakable alibis. A second murder occurs later in the narrative and there is a tantalising ending when one of the "murderers" appears to confess with the knowledge that the case could never come to trial because of a lack of evidence.