Aw, dammit,” Keefer recalls thinking when he roared past Aidan Zingg lying limp and motionless on the back section of the course, not far from his green Kawasaki dirt bike. At first, Keefer assumed Zingg would walk away from the crash,

The sister of rising motocross star Aidan Zingg seemingly shared a heartbreaking online tribute following her brother's reported death at the age of 16. Alexandria Zingg, 18, took to Instagram on Sunday,

His passing was reported by Team Green and MX Sports. Zingg crashed midway through a race and was reportedly struck by multiple bikes, according to the motocross outlet DirtbikeLo