National Park serial killers is always a spooky one. In National Parks across the USA, there's a lot more to be afraid of than wildlife. In this episode, we'll look at two stories of serial killers, Gary Hilton and Mike Bullinger, who used National Parks as their very own hunting ground.   YouTube: https://www.youtube.com/thatchapter  Instagram: https://www.instagram.com/that_chapter/  Twitter: https://twitter.com/that_chapter  Business email: [email protected]

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