The Murder of Rudolf Hess

In 1941, a man claiming to be the deputy fuhrer of Nazi Germany made a startling flight to Scotland. When he got there, he said he had a peace plan that would end the war between Britain and Germany. But the British didn't accept his plan; instead, they kept him in confinement. After the war, he was sentenced to life imprisonment in Germany's spandile prison. He died, still in prison, in 1987, apparently from suicide. Did he really commit suicide? Was he murdered? Who would have done it? Why? And was it even Rudolf Hess at all in prison? Or was it an imposter?