MOTOCROSS champion Aidan Zingg’s cause of death has been revealed.
The 16-year-old from Hemet, California, died on June 28 from injuries sustained during a crash.

The cause of death of 16-year-old Aidan Zingg has been revealed[/caption]
Zingg died of cardiac tamponade at a competition[/caption]
Zingg was a national champion in 2024, and was signed to Kawasaki’s young driver program before his death.
Weeks after his death, Zingg’s mother has revealed what happened to him.
Shari Zingg told USA Today that he suffered from cardiac tamponade.
Cardiac tamponade is a medical emergency where so much fluid surrounds the heart that it can’t pump enough blood.
Initial reports indicated that he was run over by other riders after falling off his bike.
Those have since been confirmed to be false.
The Mono County Sheriff’s Office is also carrying out an autopsy for further answers.
Following his death, Zingg’s sister, Alexandria, shared a heartbreaking tribute to her brother.
“The things I could say. The stories I could tell. It’s been a day and I feel like it’s been a lifetime. My heart is completely broken,” she wrote.
“You used to joke that I was so old and that I’d die first, I would always joke that you were crazy and you’d be the first.
“Now I’m sitting here wishing with everything that I am that you were right so I’d never have to live a day without you.
“I have no idea what today, tomorrow, or the rest of my life looks like without you in it. I had everything planned. God had a different plan.
“I’ll forever find myself longing for that last hug, that last I love you that I never got. You are a light. The vibrancy to every color in my world.
“I will forever see you in everything I do. Every time I step into the show pen it will be for you. I will work twice as hard, be twice as good, shine twice as bright, and it will never fill the space you’ve left but I will do my best to pick up where you left off.

Zingg was signed to Team Green Kawasaki for the 2025 season[/caption]
“I can’t believe you get to meet Jesus before me. Even now you’re still kicking my butt. I am so incredibly proud of you. You were so incredible that God only needed you here for 16 years to fulfill your purpose and He just couldn’t wait any longer to bring you home.
“I could write a thousand more things to you, but I’ll save them for my prayers. I love you so much it’s unreal. Fly high but don’t go too far. I love love love you bud.”
Zingg had recently qualified for the AMA Amateur Motocross National Championship for the seventh straight year.
He was signed to Team Green Kawasaki for the 2025 season.