A 61-year-old woman has been indicted on 51 felony counts of allegedly scamming Colorado out of more than $400,000 of employment benefits for the past 12 years, the Denver district attorney said Monday.

Adell Rastutis remained in the Denver County Jail on Monday on $100,000 bail. Rastutis faces 20 counts of forgery, 16 counts of committing a computer crime, eight counts of theft and seven counts of criminal impersonation.

The Denver grand jury handed down its indictment against Rastutis on Wednesday. The indictment was unsealed Friday, the district attorney's office said.

Rastutis started her criminal activity in 1994, according to the prosecutors' office. The alleged operation was not discovered until September by the Colorado Department of Labor and Employment. The Colorado attorney general has been assisting with the investigation into Rastutis.

She allegedly registered phony businesses with the state Department of Labor and Employment, according to the indictment and prosecutors. Rastutis then took on bogus identities to receive employment benefits.

Rastutis is expected to appear in Denver District Court Thursday, when she will be formally advised of the charges against her.