Updated

An autopsy on the man suspected of killing the Colorado prisons chief and a Denver pizza delivery driver found anti-anxiety medication in his system.

The examination report confirms that Evan Ebel died as a result of a gunshot to the forehead. Texas sheriff's deputies shot and killed him March 21 as he opened fire during a wild chase and shootout.

Authorities say he was on the run after killing Colorado Corrections Director Tom Clements and pizza deliveryman Nathan Leon, but it is unclear why he headed to Texas.

The Denver Post (http://tinyurl.com/lrz9he6 ) obtained the report Monday through an open-records request.

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Information from: The Denver Post, http://www.denverpost.com