Singer Oliver Tree, 5 others dead after helicopters collide in Brazil

American electro-pop singer Oliver Tree died on June 14 in a mid-air helicopter collision that killed six people in Rio de Janeiro The crash is under investigation, but Rio de Janeiro police said early indicators pointed toward human error. Subscribe to The Washington Post on YouTube: https://wapo.st/2QOdcqK Follow us: X: https://x.com/washingtonpost Instagram: https://www.instagram.com/washingtonpost/ Facebook: https://www.facebook.com/washingtonpost/ Threads: https://www.threads.com/@washingtonpost Bluesky: https://bsky.app/profile/washingtonpost.com