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Investigators are still trying to determine what caused a Flower Mound teenager to lose control of her go-kart.

The accident outside of Texas Motor Speedway killed 14-year-old Kierstin Eaddy. She was taking part in an autocross event sponsored by the Sports Car Club of America.

News 8 anchor and reporter Marcus Moore is knowledgeable about the karting scene, and on News 8 at 4, he walked us through the capabilities of go-karts and their safety features.

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