Authorities found traces of nordiazepam, oxazepam and temazepam, which are consistent the drug Valium in his urine. The autopsy included toxicology tests and a brain examination. A separate review of his brain done at Stanford University found no neurological abnormalities, such as evidence of Alzheimer’s disease.
In addition to finding the anti-anxiety medication, the autopsy confirmed that the 64-year-old died of a self-inflicted gunshot wound to his head after he opened fire from his Mandalay Bay suite. The autopsy did not indicate any physical or mental reasons that could explain the mass shooting. “It seems that based on the autopsy reports there were no physical excuses for what Steve did,” said his younger brother Eric Paddock. “We may never understand why Steve did this.”