Watch Lars as a guest expert on ABC’s 20/20 this Friday 9pm Pacific: Who is The Happy Face Killer? Check out the trailer: Facebook: https://www.facebook.com/watch/?v=625524938456709 IGTV: https://www.instagram.com/p/CVvlUJDLtmu/ Twitter: https://twitter.com/ABC2020/status/1455241649001541636
