Federal inspectors say a Texas driver suffering from "acute sleep deficit" failed to maintain his lane and caused his passenger bus to careen out of control, killing nine people in 2016 and injuring nearly 40 others.
The National Transportation Safety Board on Tuesday released its final report on the crash, determining that the bus left the road and rolled over when the 29-year-old driver overcorrected and abruptly braked.
Inspectors say the road was wet from a recent rain and the bus had an inoperable antilock braking system.
The bus began its trip in Brownsville, in far South Texas, and was en route to the Kickapoo Lucky Eagle Casino in Eagle Pass in May 2016.
Seven passengers died at the scene.
The report does not identify the bus driver.
Copyright AP - Associated Press
