Singer Oliver Tree presumed dead after helicopter collision in Rio de Janeiro, Brazil

American singer and record producer, Oliver Tree, 32, is presumed dead after a tragic helicopter collision. The California native was reportedly among six people killed when two helicopters collided in Rio de Janeiro, Brazil, on Sunday morning, according to the Associated Press. Rio de Janeiro’s Military Fire Department said that one of the helicopters crashed on a car dealership, where several electric vehicles were parked, igniting a fire that was extinguished, the AP reported. CLICK HERE TO S