Final answer:
Jack the Ripper was the notorious killer in question. He was an unidentified serial killer who terrorized the Whitechapel district of London in the late 1800s. The case remains unsolved to this day.
Step-by-step explanation:
The notorious killer in question is Jack the Ripper. Jack the Ripper was an unidentified serial killer who terrorized the Whitechapel district of London in the late 1800s. The case remains unsolved to this day and has captured the public's fascination throughout history. Numerous books, songs, and stories have been written about the events surrounding the Jack the Ripper murders.