In 1931, a Liverpool insurance agent returned home to find his wife savagely murdered—and himself at the center of one of Britain’s most baffling murder mysteries. With an airtight alibi, a fake appointment, and no clear motive, the case of Herbert and Julia Wallace remains unsolved to this day.
SourceMaterials:
https://www.williamherbertwallace.com/general/the-murder-of-julia-wallace/
https://www.livpost.co.uk/chess-prank-calls-and-murder-who/
https://www.mentalfloss.com/article/551903/impossible-1930s-murder-still-fascinates-crime-writers
https://www.liverpoolecho.co.uk/news/nostalgia/infamous-man-pru-murder-thats-29642600