Question: Generate a question about the following movie plot: Slade, a serial killer, is a lodger in a 19th Century family's London home. So is a singer, Kitty Langley, who definitely has caught Slade's eye. Women are being brutally killed in the Whitechapel district. Scotland Yard is investigating and a detective, John Warwick, begins to cast his suspicions in Slade's direction. Kitty, meanwhile, has also developed an attraction to Slade. Slade goes to see her perform at a cabaret. He goes backstage afterward and tries to make her his next victim, but Warwick's men get there just in time. Unwilling to be taken into police custody, Slade flees to the riverbank and leaps to his death.
Answer:
The killer's methods are identical to what 19th century psychopath?