The exhaustive search for slain travel blogger Gabby Petito's fiance, Brian Laundrie, in a vast Florida wilderness entered a sixth day on Thursday as the mystery deepened around a case that has engrossed Americans. #GabbyPetito #BrianLaundrie #News #Reuters Subscribe: http://smarturl.it/reuterssubscribe Reuters brings you the latest business, finance and breaking news video from around the globe. Our reputation for accuracy and impartiality is unparalleled. Get the latest news on: http://reuters.com/ Follow Reuters on Facebook: https://www.facebook.com/Reuters Follow Reuters on Twitter: https://twitter.com/Reuters Follow Reuters on Instagram: https://www.instagram.com/reuters/?hl=en