The Pima County Sheriff’s Department’s former second-in-command is facing seven federal charges including theft of nearly $500,000 in federal funds and conspiracy to launder money, newly released court documents show.

The Sept. 28 grand jury indictment, released Wednesday by the U.S. Attorney’s Office, alleges that between 2011 and 2016, Christopher M. Radtke embezzled, stole or fraudulently obtained at least $500,000 of forfeiture money from the Sheriff’s Auxiliary Volunteers fund.

The Sheriff’s Department claimed it was donating forfeiture funds to the auxiliary volunteers fund, but the department itself was using the money, the indictment says. “This laundering of the forfeiture funds enabled the Sheriff’s Office to use the money free from regulations relating to forfeiture funds and procurement,” it says.

Radtke, who resigned Monday as chief deputy, could not be reached for comment, and it wasn’t immediately known if he has an attorney.

Public records previously obtained by the Star showed that between January 2010 and October 2015, the Sheriff’s Department transferred nearly $720,000 in forfeiture funds into the auxiliary volunteers fund.

Radtke was indicted after a months-long FBI investigation, which began after the Star reported that his niece, Nikki Thompson, took over a cafe inside the Sheriff’s Department’s headquarters in 2011.

Thompson was operating cafes inside headquarters and the Pima County Adult Detention Center without a county contract, and the department spent more than $30,000 in renovations and improvement to the locations, the Star reported in November 2015.