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Coroner: What Led To Bus Driver's Death Inconclusive

THORNTON, Colo. (CBS4)- What led to the death of the driver in a deadly bus crash remains a mystery. The coroner's autopsy report on Kari Chopper doesn't answer a critical question about the investigation.

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Kari Chopper (credit: John Chopper)

The coroner's report states that Chopper died of injuries suffered when the bus struck a concrete pillar. The coroner was not able to determine whether she had a medical issue that led to the crash.

The coroner previously had told Kari's husband that she had an enlarged heart and may have had a heart attack.

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(credit: CBS)

The Legacy High School Varsity and JV football teams were leaving DIA on buses after returning from a game in California on Sept. 11. Chopper somehow crashed into a concrete bridge in the passenger pick up area and was killed. Fifteen students were taken to the hospital. Three coaches were seriously injured.

DIA Bus Crash
(credit: Denver Police Department)

Bus drivers are required to undergo a Department of Transportation medical exam every two years. Kari passed a physical exam in May. She worked for the Adams 12 School District for four years and her husband said she loved her job.

LINK: Kari Chopper GoFundMe page

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