As the Swinging Sixties drew to a close, people in California’s Sand Francisco Bay Area lived in fear of a mysterious serial killer who taunted police with a series of cryptic clues. The mystery of the so-called “Zodiac Killer” persists to this day – it’s regarded as the most famous unsolved murder case in American history, and has inspired dozens of documentaries and fictional accounts ranging from Dirty Harry to The Batman.

But a Californian TikTokker named J Foy claims not only to have unmasked the feared killer - he claims to be the murderer's grandson. Foy explained: “This is not just based off physical appearance. I typed in my grandpa's name on Google the other day and, to my surprise ,internet sleuths have been throwing my grandpa's name around for years connecting him as the Zodiac motherf*****g killer.