The story of the three Garridebs was truly a ruse, there are many shreds of evidence in the story that support the same. First, one being the difference in the appearance of the detective who was supposedly American but was dressed up so British. That sows the seeds of suspicion. This was covered up by providing the fact that he was a lawyer in Kansas which was just a bait that he fell for.As the story unfolds, the proceedings tell us about the factual reveal of the truth.