I always see lots of criticism based on the fact that the Duke of Windsor was a Nazi sympathizer, but I barely ever see anyone talking about how he helped cover up a murder!
While he was the governor general of the Bahamas, the richest man in the British "Empire", Sir Harry Oakes, was brutally murdered. The Duke of Windsor, though he was friends with Oakes, tried to keep the press from reporting on the murder and didn't let any local police investigate the crime. He instead called in two detectives from Miami, who framed Oakes' son-in-law using falsified evidence. The evidence was planted right after the Duke met with the detectives. Everything came to light during the son-in-law's trial, and he was exonerated. The Duke of Windsor still banished him from the Bahamas, though. The investigation into Oakes' murder was dropped and no one knows what really happened.
No one agrees on the level of involvement that the Duke of Windsor had in the murder. Was he covering up for a friend? Was he just trying to cover up the crime to make himself look like he had things under control? Or... did he know about the murder before it occurred?
It's a fascinating case that leads you down quite a rabbit hole. Personally, I think the Duke of Windsor knew who had ordered the murder, and wanted to protect him. Interestingly, the man who most people think ordered the murder, Harold Christie, was later knighted by the Queen.
I just thought I'd mention it in this thread since not many people talk about it! One author referred to this as the Duke's "biggest blunder".