In 1919, a serial killer in New Orleans stated he would kill again, but would spare the occupants of any place where a jazz band was playing. On that night, all dance halls reached capacity and amateur bands played jazz at hundreds of house parties. There were no murders.
There has been a very real problem in Northern Canada for decades. Native hitchhikers, mostly women, tend to go missing without explanation along a 800km stretch of road known as the Highway of Tears. Many think it is caused predominantly by 1-2 unknown serial killers.
Serial killer Rodney Alcala acted as his own attorney in his trial. For five hours he interrogated himself on the witness stand, asking questions addressed to “Mr. Alcala” in a deep voice and answering them in his normal voice.
Jake Bird was a truly creepy character — an axe-murderer who may have killed as many as 46 people. But even after he was caught in 1947 and sentenced to death, he’s said to have continued killing people by putting the “Jake Bird hex” on them. Six people associated with the trial were said to have succumbed to his hex.
A Hungarian man murdered 24 women and attempted to pickle their bodies in beer before enlisting to fight in World War 1. When his crimes were discovered, he evaded capture and was never heard from again.
Kansas serial killer, the BTK Killer, installed alarms as a part of his job, and many of his clients had booked the company to stop BTK from ever entering their homes, unaware that BTK himself was installing them.
Serial killer and cannibal Richard Chase only broke into houses that were unlocked. If they were locked, he thought it meant he was unwelcome but if they were not he saw it as an invitation to enter.
The “Soapmaker of Correggio” made soap out of her human victims by boiling them in caustic soda.
There was a pig farmer who murdered 49 women and fed them to his friends.
A serial killer in Southern California is alleged to have used some flesh from one of his victims in chili he made to for a chili cook-off. He won.