I'm not sure why so many ridiculous notions about Jack the Ripper are given serious consideration, when the 'suspects' bear absolutely no relation to the sort of people who we know do commit serial killings.
The idea that the Ripper would be a son of the Queen or a famous artist was always absurd. The killer was Aaron Kosminski- a Pole who came to Britain to escape anti-Jewish violence in his home country. One part of the story that amused me was how the crucial piece of evidence was still available in a relatively untainted state into the 21st century:
the shawl had been taken by a police officer for his wife, but she never wore it, and it was passed down through generations until it went up for sale.So back in the late 19th century there was a bobby whose first reaction upon finding a brutally murdered young woman was to steal the clothes that he thought his wife might like! Dodgy police officers aren't a new phenomenon, they were just less likely to get caught in the past.