The following people were charged Friday in the federal immigration investigation in Sierra Vista.

€ Ivan Hardt, 44, of Sierra Vista, president of Sun Drywall, charged federally with conspiracy to knowingly hire illegal aliens and conspiracy to harbor illegal aliens.

€ Carol Hill, 42, of Sierra Vista, human resource manager for Sun Drywall, charged federally with conspiracy to knowingly hire illegal aliens and conspiracy to harbor illegal aliens.

€ Jose Gutierrez-Tapia Sr., 50, of Bisbee, foreman for Sun Drywall, charged federally with conspiracy to knowingly hire illegal aliens and conspiracy to harbor illegal aliens.

€ Joaquin J. Neave, 42, of Sierra Vista, a manager for Sun Drywall, charged federally with conspiracy to knowingly hire illegal aliens and conspiracy to harbor illegal aliens.

€ Efrain Silvain-Avechuco, 36, of Mexico, block manager for Sun Drywall, charged federally with conspiracy to knowingly hire illegal aliens and conspiracy to harbor illegal aliens.

€ Omar Reyes, 25, of Sierra Vista, Sun Drywall employee, charged federally with conspiracy to knowingly hire illegal aliens and conspiracy to harbor illegal aliens.

On Friday afternoon, another man named in the federal indictment on the case, Edward Ramirez-Durgin, was taken into custody. No further information is known about what charges he faces.

And federal authorities said an eighth person was still at large in the investigation.

A conviction for conspiracy to knowingly hire illegal aliens, a class B misdemeanor, carries a maximum penalty of six months in prison, a $3,000 fine per unauthorized alien employed, plus other possible fines. A conviction for conspiracy to harbor illegal aliens carries a maximum penalty of five years, a $250,000 fine or both.