BLAIR – Earlier this morning a crash at Blair High Road and State Street sent a person to the hospital. We have now learned that this person has died. Identified as David Markley, a Science teacher for over ten years at Kiewit Middle School in Omaha. School officials say it was determined that Markley died as the result of a heart attack that led to that accident. Irvington and Bennington Rescue crews as well as Douglas County deputies responded to that accident around 6:30 this morning.