![Mexico border map](https://ticklethewire.com/wp-content/uploads/2010/01/Mexico-border-map-300x211.jpg)
A Mexican man accused of killing a U.S. Border Patrol agent during a 2010 exchange of fire near the Arizona-Mexico border is expected to change his plea today in federal court, the Associated Press reports.
Manuel Osorio-Arellanes had pleaded not guilty to murder, assaulting a federal officer and other charges in connection with the death of Border Patrol Agent Brian Terry.
Authorities said the firefight began when Osorio-Arellanes and four other men planned to rob marijuana smugglers.
Three of those men remain fugitives, the AP reported.