A U.S. soldier has been arrested and is facing murder charges for allegedly being the trigger man in the shooting death of a Mexican drug cartel member who was a informant for the United States.

Police say 18-year-old Michael Jackson Apodaca was arrested Tuesday in El Paso, in the southern state of Texas. 

Apodaca, a soldier at Fort Bliss, is charged with the murder of Jose Daniel Gonzalez Galeana. 

Gonzalez was a mid-level member of Mexico's powerful Juarez drug cartel, but was also working as a U.S. government informant.  He was shot eight times outside his home in May.

Also in custody is Christopher Duran, who is believed to have driven the getaway vehicle; and Ruben Rodriguez Dorado, who is also an informant and is accused of contracting the murder for hire.  A fourth suspect, Jesus Aguayo Salas is still being sought in the murder. 

Some information for this report was provided by AP.