U.S. Border Patrol Agent Brian Terry.
A man charged in the 2010 murder of U.S. Border Patrol Agent Brian Terry was extradited to the United States and entered a not-guilty plea in federal court in Tucson Thursday.

Lionel Portillo-Meza was arrested in Mexico in September 2012. He was extradited to the U.S. Tuesday.

Terry died when he and other Border Patrol agents were fired at while working near Nogales. One of the weapons used in the murder was trafficked into Mexico as part of Operation Fast and Furious. The operation was set up by the U.S. government to track illegal purchase and sale of guns to Mexican cartels.

The U.S Department of Justice called Portillo-Meza's extradition a “major step forward” in the prosecution of Terry’s murder.

Portillo-Meza is being held without bond, and U.S. attorneys from California are prosecuting him.

Others have been prosecuted, or are suspected of involvement in the crime:

Manuel Osorio-Arellanes: pleaded guilty first-degree murder in 2014, sentenced to 30 years.
Rito Osorio-Arellanes: pleaded guilty to conspiracy to interfere with commerce by robbery in 2013, sentenced to eight years.
Ivan Soto-Barraza: arrested in Mexico September 2013.
Jesus Rosario Favela-Astorga: award offered for information leading to arrest.
Heraclio Osorio-Arellanes: award offered for information leading to arrest.