Officials Monday confirmed the identity of a second body pulled from the wreckage at the Echelon building in Northwest Austin is that of the pilot -- Joseph Stack, 53.
The Travis County Medical Examiner's office released its report.
The office spent the past few days examining the two bodies officials pulled from the rubble, after the pilot intentionally flew a plane into the building Thursday.
Medical examiners say Stack's death was caused by blunt force injuries. His death has been ruled a suicide.
The attack also killed IRS employee, Vernon Hunter. Hunter was working in the building Thursday morning when the plane hit. The Medical Examiner's Office says hunter died of carbon monoxide poisoning and burns.
Many of his co-workers continue struggling to come to an understanding.
“It was extremely emotional. Thursday, I think a lot of us were in denial. By Friday, everyone came to work. People were crying because you know we're like a big family and we really, really do try to help the taxpayer,” said IRS employee, Vicki Cavaleri.
Employees at the Echelon building will meet with U.S. Treasury Secretary Timothy Geithner Monday afternoon.
Geithner is expected to do a walk-through of the wreckage and then talk to the survivors and the family of Hunter. The meeting will be closed to the public.
In the meantime, federal crews Monday were working to close the federal investigation at the Echelon building in Northwest Austin.
The Highway 183 frontage road in front of the Echelon building remains closed to traffic. The Texas Department of Transportation says a group of structural engineers are studying the integrity of the four-story office building.
Until it's declared safe, the frontage road will stay closed to through traffic.
