DENVER -- The Weld County district attorney has made 160 shirts to take a jab at the American Civil Liberties Union for recently filing a lawsuit against him.

The black lettering says on the front: "The ACLU Sued My District Attorney & Sheriff."

“I felt the ACLU was trying to come up here and intimidate us into not enforcing the laws”, said Buck. “And I think people are frustrated with bending over backwards for folks who are not in this country legally, while penalizing people who are hard working, American citizens having their identity stolen.”

The ACLU's lawsuit alleges District Attorney Ken Buck and the county sheriff illegally seized records from an income tax service as part of an identity theft investigation. Buck alleges more than 1,300 immigrants filed tax returns with false or stolen identities.

The back of the shirts, designed and paid for by Buck, read: "Weld County Standing Up For Americans."

Buck is taking his identity theft cases to a grand jury after a judge ordered him to stop filing more cases because they included confidential information.

Mark Silverstein, legal director for the ACLU of Colorado, said Weld County law enforcement violated the privacy of thousands by seizing person tax forms from the preparation service.

"If the sheriff and D.A. can comb through the files of 5,000 taxpayers on the theory that some of them are doing wrong, then none of our private information is safe," said Silverstein. "It’s the equivalent of house-by-house search on the authority that suspect could be somewhere in the neighborhood."