Unsolved Murders: 7 Mysteries of All Time.

The unidentified serial killer who terrorized London’s Whitechapel district in 1888 remains the most infamous unsolved murderer in history, spawning countless theories and investigations.

Active in Northern California in the late 1960s, the Zodiac Killer taunted police with coded letters and was never conclusively identified, despite decades of investigation.

The 1996 murder of the six-year-old beauty pageant contestant in Boulder, Colorado, remains unsolved, with intense media scrutiny and ongoing debate over suspects.

Elizabeth Short’s gruesome 1947 murder in Los Angeles shocked the nation, and despite numerous suspects and confessions, no one has ever been charged.

The 1996 drive-by shooting of the influential rapper in Las Vegas remains officially unsolved, fueling decades of speculation about rivalries and conspiracies.

In 1912, eight people were brutally murdered in Villisca, Iowa; despite multiple suspects and trials, the killer was never definitively identified.

In 1982, seven people in the Chicago area died after ingesting cyanide-laced Tylenol capsules, leading to sweeping changes in packaging but no conclusive conviction.