Is Murder in Greenwich based on a true story?

Yes, "Murder in Greenwich" is based on a true story. It recounts the real-life murder of Martha Moxley, a teenager who was killed in 1975 in Greenwich, Connecticut. The case garnered significant media attention and remains unsolved, with various theories and suspects over the years, including members of the affluent Kennedy family. The film dramatizes the events surrounding her death and the ensuing investigation.