DES MOINES, Iowa (AP) -- A man implicated in an immigration scam at a Marshalltown meatpacking plant has pleaded guilty to harboring an illegal immigrant, according to the U.S. attorney's office.

 

Christopher Lamb, a human resources manager at Swift & Co., was arrested last summer after authorities recorded him coaching an illegal immigrant on how to use fake documents to get hired.

 

The worker Lamb allegedly coached, Alejandro Vasquez-Avina, was among those arrested during a raid on the Swift plant in December 2006.

 

After Vasquez-Avina's arrest, Immigration and Customs Enforcement agents fitted him with a concealed microphone on June 3 and sent him to Lamb's house while agents recorded the conversation, court documents show.

 

Vasquez-Avina asked for his job back and was told by Lamb that others arrested in December were already back working at the plant. Records show that Lamb told Vasquez-Avina that he shouldn't come back under the same name.

 

In his plea, Lamb also admitted hiding an illegal immigrant at the plant from June 3 to June 25.

 

Lamb has been sentenced to 12 months of probation.