PAPILLION, Neb. (AP) — A 54-year-old Gretna, NE., woman already serving time for tax evasion has pleaded guilty to stealing the $4.1 million on which she didn’t pay taxes. Caroline Richardson made her plea Monday in Douglas County, NE., District Court in Omaha. Her sentencing is scheduled for March 18th. She faces up to 10 more years in prison. She’s already serving a five-year term.

Prosecutors say Richardson stole from Omaha-based Colombo Candy and Tobacco in 2010 and 2011 while working as company controller. Prosecutors say she used the money to gamble at Ameristar Casino in Council Bluffs, Iowa. Colombo has sued Ameristar, saying the casino knew about Richardson’s job and her approximate salary and should have known Richardson was gambling with ill-gotten money.