Accused Idaho killer Bryan Kohberger’s sister starred in horror movie — about young people being stabbed to death Amanda Kohberger appeared as “Lori” in the 2011 flick “Two Days Back” about a group of young students who meet their grisly end at the hands NEW YORK POST The movie was called “Two Days Back” and apparently bears eerie similarities to the knife attacks in remote Moscow, Idaho, that left four young college friends stabbed to death in their beds, crimes of which Bryan now stands accused. “You’re f—king kidding me, her brother is that guy? Goddamn, man, holy cow,” said “Two Days Back” director Kevin Boon, when reached by The Post Wednesday. Boon, a professor of English and media studies at Penn State Mont Alto, explained he made the film with students and cast aspiring actress Amanda Kohberger after an open audition