Final answer:
Jack the Ripper was credited with 5 known murders, known as the 'canonical five,' which were extensively covered by the media.
Step-by-step explanation:
Jack the Ripper, the infamous serial killer who operated in London in the late 1800s, was officially credited with 5 known murders. These murders, known as the 'canonical five,' include the deaths of Mary Ann Nichols, Annie Chapman, Elizabeth Stride, Catherine Eddowes, and Mary Jane Kelly. These murders were particularly gruesome and became the focus of extensive media coverage at the time.