Published: Sep 07, 2012 4:08 PM EDT

MIAMI (AP) - A former Calder Race Track and Casino employee has pleaded guilty to his role in a robbery that left an armored truck guard dead.
    
Reginald Mitchell pleaded guilty Thursday in Miami federal court to robbery conspiracy, interfering with commerce and possession of a firearm resulting in death during a crime of violence.
    
Authorities say the 27-year-old man is one of several people who plotted to rob a Brinks truck at Calder in August 2011. The South Florida Sun Sentinel (http://sunsent.nl/OtG0Pp ) reports that Mitchell's girlfriend, 27-year-old Victoria Barkley, has also pleaded guilty for her role, and 24-year-old Byron Kyler is scheduled for a change of plea hearing later this month.
    
Authorities say 34-year-old Vladimir Louissant fired the shot that killed Alvaro Lopez Ramos. He and 27-year-old Uri Ammar, who had worked as a security supervisor at the track, are still awaiting trial.
    
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Information from: South Florida Sun Sentinel, http://www.sun sentinel.com

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