Ex-state Rep. Nick Sauer was indicted Wednesday on felony charges of posting nude photos of two women online without their consent.

A Lake County grand jury returned the indictment Wednesday morning, charging Sauer with 12 felony counts of non-consensual dissemination of private sexual images, according to a statement from the Lake County state’s attorney’s office.

The charges came five months after the 36-year-old Lake Barrington Republican resigned when an ex-girlfriend publicly accused him of creating a fake Instagram account with her likeness to post sexually explicit photos of her.

Sauer — who served on the Illinois House Sexual Discrimination and Harassment Task Force — allegedly used the account to lure other men into graphic discussions, according to allegations first uncovered in August by Politico.

Prosecutors said the charges against him are related to two separate victims. A spokesperson for the state’s attorney’s office declined to comment on whether charges stemmed from the allegations against Sauer that became public in August.

Under the felony “revenge porn” legislation signed by former Gov. Pat Quinn in 2015, Sauer could face up to three years in prison and a fine of up to $25,000 for each count, if convicted.

The state’s attorney’s office has been in touch with Sauer’s attorney and authorities said they expect him to turn himself in by Thursday morning.

Neither Sauer nor the woman who first accused him of misconduct returned messages seeking comment on Wednesday.

That woman initially filed a Chicago police report and a complaint with the Office of the Legislative Inspector General in mid-July, authorities said previously.

The 38-year-old Near North Side woman told police she had shared the photos with an unnamed ex-boyfriend over a two-year period before someone on social media alerted her to the fake account.

The police report didn’t describe the photos, but said her former boyfriend asked her to “participate in the acts depicted.”

Sauer resigned Aug. 1, hours after Politico published a report detailing the woman’s complaint with the legislative inspector general’s office, in which she claimed Sauer “came to my house & confessed to catfishing men with my photos for 2 years to at least 8 men. He was unable to provide the names and begged that I let it go.”

His swift resignation came at the behest of Republican leaders including Gov. Bruce Rauner, who had appointed the then-rising political star to be an Illinois Tollway Authority Board director in 2015 before Sauer was elected to the General Assembly in 2016.

Sauer grew up in Barrington and previously served on the District 220 school board and the Lake County Board of Commissioners.

Helene Miller Walsh, the wife of ex-congressman and conservative firebrand Joe Walsh, was appointed to fill Sauer’s 51st District seat. She lost to teacher and Democrat Mary Edly-Allen in the general election.