The owner of Greenville Architectural Glass in Greenville, Ohio, pleaded guilty to not paying employment taxes yesterday. Gail Cooper was the sole owner of the glazing company from 2007 to 2015. According to the U.S. Department of Justice, she admitted that her action caused a loss of more than $500,000 to the U.S. government.

Cooper has admitted to withholding income taxes, Social Security and Medicare taxes from employees’ wages from the first quarter of 2013 through the second quarter of 2015, but never turned those taxes over to the Internal Revenue Service (IRS).

Cooper also admitted that she filed false individual income tax returns for the years 2008 through 2010, on which she understated Greenville Architectural Glass’ gross receipts and overstated its expenses. She also admitted to willfully failing to file income tax returns for the years 2011 through 2014, despite having a professional tax return preparer complete the returns.

Cooper faces up to five years in prison and a $250,000 fine. Her sentencing was scheduled for August 2, 2019.

In March 2016, Cooper admitted to not paying employees overtime compensation and was ordered to pay nearly $18,000 in back wages and liquidated damages to 16 employees. According to the Dayton Daily News, Greenville Architectural Glass also misclassified employees working as window installers as independent contractors at the time.