Jack the Ripper's origin story is clouded in mystery. It was around the late 19th century in the Whitechapel area of London. He targeted mainly female prostitutes. Some believe he could have been a disgruntled former patient of a mental institution who was released and took out his frustrations on these women. Others think he might have been a member of the upper class trying to cover up some sort of scandal by killing these 'undesirable' women. But again, all of these are just theories.