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The ACLU of Tennessee is challenging Knox County Sheriff JJ Jones' controversial comments on an immigration enforcement policy.

Last week, Sheriff Jones learned Immigration and Customs Enforcement denied Knox County's bid for the 287(G) program.

Jones promised to enforce immigration violations and said he would stack violators like "cordwood" behind bars. Those comments sparked protests last week from immigration supporters.

Wednesday, the ACLU weighed in further saying Sheriff Jones does not have the authority to enforce the law. The organization claims any attempt by Jones to hold suspects based on their immigration status would be unconstitutional.

In a statement a spokesperson said --

"Sheriff Jones' vitriolic statement undermines Tennesseans' values of fairness and equality."

The organization also called on Jones to publicly correct his statement.