The Haunted Strangler (1958)

Factual error: The film begins in 1860, but the majority takes place 20 years later, so 1880. When James Rankin obtains files on the Haymarket Strangler/Edward Styles case we are shown another box labelled with details about Jack the Ripper, who wasn't active until 1888.

Andrew Upton

Supt. Burk: I've been back over the records, and given you at least a dozen cases - why on Earth choose this one?
James Rankin: It's the one clear case that'll prove my point! If Styles had had the money to buy an adequate defense, he never would have hanged.