Roller Coaster Death: What Went Wrong on Texas Giant?

Investigators are trying to figure out why Rosy Esparza fell to her death.
1:59 | 07/22/13

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Transcript for Roller Coaster Death: What Went Wrong on Texas Giant?
We need the latest now that terrifying roller coaster accident Six Flags over Texas where a woman -- -- -- -- in full view of other park goers. Investigators now trying to figure out what went wrong why she wasn't security in her -- I think she's -- send -- on the scene. This morning the German company that builds the cars for the Texas giant is reportedly sending experts to Six Flags over Texas to help unravel a tragic mystery. How -- -- that felt to her death. Her son was on the ride to. It was derailed BC news -- restraint was and it's you know normal position that -- See them leave with -- -- there was nobody. Writers are supposed to be held in with a T shaped lap bar. Carmen brown says she heard a sparse at -- an employee before the ride her lap bar might not be secure. She goes up like they -- And then it drops to come down that's when it released and she -- on stumble. But with no sign of foul play determining what happened is up to Six Flags. In a statement the company says we are committed to determining the cause of this tragic accident and will utilize every resource throughout this process. This -- this size have played a role G. No bigger than I was like that could've been me. Safety experts say the seats are built for adults who weigh 180 pounds but the Texas giant does not have a weight restriction. The operators should absolutely be able to determine. If a person's. Body mass. We -- in deriding compartment. And restraint mechanism correct only fish their body. -- industry insists its rides are safe estimating the chances of being injured 124. Million. A chance of being killed one in 750. Million. And Six Flags says it will not speculate at this point on what caused the accident in the meantime the Texas giant will remain shut down until their investigation is complete.

This transcript has been automatically generated and may not be 100% accurate.

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