A corrections officer in New Mexico is accused of participating in a scheme to smuggle drugs into the Otero County Prison Facility in Chaparral.
Federal prosecutors say 37-year-old Luis Delgadillo is one of six people charged in a criminal complaint with conspiracy to violate the federal narcotics laws.
Delgadillo, of El Paso, Texas, was arrested by the FBI last month.
The other defendants are two women who live in New Mexico and three men who are prison inmates.
According to the criminal complaint, the FBI began its investigation in January after receiving information from the New Mexico Corrections Department that Delgadillo allegedly was smuggling heroin and methamphetamine into the prison.
A federal magistrate in Las Cruces on Wednesday ordered Delgadillo detained pending trial. It's unclear if he has a lawyer.