An updated crash report has been released in the deadly Iraan cheerleader bus crash.

DPS reports a woman involved in the crash, Sandra Dawn Dunson of Midland, 59, had a Blood Alcohol level of .123 over the legal limit of .08.

According to the report, Dunson was determined to be intoxicated due to ingesting drugs and alcohol but was not arrested due to her need to be treated for injuries.

Dunson was behind the wheel of a 2001 Buick Century.

The report also notes that investigators were unable to determine the three lanes the vehicles involved in the crash were in due to inconsistency in witness statements and a lack of tire marks.

The report shows that the area of impact was inside the eastbound lane due to debris found there. There are two possible scenarios about what led up to the crash:

1. The Buick, driven by Dunson, was driving eastbound in the outside lane when it made an unsafe lane change in front of an 18-wheeler.

2. The Buick and the 18-wheeler were both traveling in the inside eastbound lane and that the 18-wheeler failed to control its speed, striking the Buick.

It was then both the car and the 18-wheeler crossed the median and drove into the westbound lanes.

The 18-wheeler crashed into the Iraan-Sheffield ISD school bus, killing cheer sponsor Liz Castaneda Pope and injuring everyone else in the bus.

The woman's car crashed into another vehicle traveling westbound ahead of the bus. Both vehicles eventually came to a stop in the westbound lanes.

The driver of the 18-wheeler, Chazton Maxwell Billings, 34, was not impaired at the time, according to the report.

Dunson died in March, but the death was unrelated to the crash DPS states.