The District on Tuesday sued a former employee for tax fraud, nearly five months after she pleaded guilty to federal charges tied to the same plot.

The city contends that Kimberle Davis, who worked in the D.C. Office of Tax and Revenue, helped perpetuate a scheme of filing false tax returns by accessing government records to determine if clients of a private accounting service were facing audits.

The lawsuit, filed against Davis and two other people, seeks about $1.2 million in damages.

"Our office is committed to pursue all remedies against those who defraud the city," D.C. Attorney General Irvin Nathan said in a statement. "It is especially disturbing when a city employee abuses the public trust by taking part in a fraud that deprives the District of needed revenue."

Davis pleaded guilty in October to conspiracy and first-degree theft charges and is awaiting sentencing.

As a part of the criminal case, Davis acknowledged that she helped file hundreds of fraudulent tax returns that led to millions of dollars in invalid refunds. Nearly 300 of the returns were for District residents, and those fraudulent filings led to about $305,000 in refunds.