Story highlights The indictment has not yet been issued, but prosecutors have told him that it is due shortly.

Schock, a Republican from Illinois, resigned his seat in March 2015 in scandal.

(CNN) A federal grand jury returned an indictment charging former Rep. Aaron Schock after a congressional ethics investigation revealed that he used taxpayer money to fund lavish trips and events.

Schock resigned his seat in March 2015 amid scandal, which most prominently featured the Illinois Republican decorating his congressional office in the style of the popular PBS drama "Downton Abbey." He later came under scrutiny for flights on private jets -- including planes owned by key donors -- concert tickets and other entertainment expenses. He's also under fire for lapses in reporting some of his expenses.

The indictment of 24 counts was announced Thursday.

Shock said in a statement Thursday that the investigation had been politicized, and even at one point compared his conduct to that of Hillary Clinton, the former Democratic presidential nominee. He said prosecutors tried to "attempt to manufacture a crime."

"After this experience, I am forced to join millions of other Americans who have sadly concluded that our federal justice system is broken and too often driven by politics instead of facts," he said. "Unlike some politicians, I did not delete any emails, nor did my staff smash or destroy any electronic devices ... I knew I had nothing to hide, and I believed that a quick review would prove this fact."

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