Real-world mysteries make great puzzles. Attempting to solve them helps us to sharpen our minds. Furthermore, these mysteries are fun. However, the primary rule for this kind of puzzle-solving is to remain scientific and objective, lest one drifts into the realm of unsupportable conspiracy theory, for or against any official story. In the final part of this six-part series, we review an alleged eye-witness report and consider what has been proposed using modern technologies to get some final answers about the death of King Ludwig.