10 Most Shocking Unsolved Crimes
6. Jack The Ripper
If there was one profession to avoid in London 1888, it was prostitute, and not just because contraception and sexual health services weren't what they are today.
Between August and November that year, the streets of Whitechapel ran red with blood thanks to the handiwork of Jack the Ripper, the infamous serial killer who claimed the lives of five women.
Although there are serial murderers with a far higher bodycount than old Jack, he's easily one of the most notorious who ever lived, and is now the subject of countless books, movies, and televsion shows.
The Ripper murders were coupled with taunting notes sent to law enforcement, and at one point, he even posted one of his victim's kidneys to his pursuers.
Serial murders were virtually unheard of at the time, so these bloody crimes led to public uproar and the eventual resignation of the home secretary and London police commissioner when the official investigation turned up only blanks.
Chief suspects in the Ripper case included Aaron Kozminski, a Jewish Polish immigrant with a fondness for prostitutes who was committed to an insane asylum after the final murder, and Montague Druitt, a barrister with medical training whose body was found floating in the Thames sometime after the killing spree had subsided.