[Part 1 of 2] Carole Sund and her teenage daughter Juli were excited to take their family friend and Argentinian exchange student, Silvina Pelosso, on a trip to see the natural wonders of Yosemite National Park. But when they fail to arrive at the San Francisco Airport for their scheduled flight home, investigators suspect that the trio might have met with foul play.  --- Episode narrated by the Anonymous Host Researched by Jessica Forsayeth Written by Elsha McGill  Creative Director: Milly Raso For all credits and sources please visit casefilepodcast.com/case-161-the-yosemite-sightseer-murders-part-1