Search for missing four-year-old Gus Lamont continues | 7.30

After five months of investigation, the disappearance of Gus Lamont remains a mystery. Police are using drones to scan the property and surrounding outback. 7.30’s James Wakelin reports. Subscribe: https://ab.co/3yqPOZ5 Welcome to ABC News In-depth, where you'll find our long-form journalism and other videos to help you understand what's going on in the world around you. Watch more ABC News content ad-free on ABC iview: https://ab.co/2OB7Mk1 For more from ABC News, click here: https://ab.co/2kxYCZY Get breaking news and livestreams from our ABC News channel: https://www.youtube.com/user/NewsOnABC Like ABC News on Facebook: http://facebook.com/abcnews.au Follow ABC News on Instagram: http://instagram.com/abcnews_au Follow ABC News on Twitter: http://twitter.com/abcnews Note: In most cases, our captions are auto-generated. #ABCNewsIndepth #ABCNewsAustralia