An Oahu grand jury indicted a school employee at Aliamanu Elementary School on Thursday on a theft charge for allegedly stealing tens of thousands of dollars from the school’s lunch program.

Ada T. Martin, 51, of Honolulu was charged with first-degree theft for taking $37,156.31 from the school between 2012 and 2014 by “manipulating the meal tracker computer program,” the attorney general’s office said in a news release Friday. She also is charged with using a computer in the commission of a separate crime.

The theft charge is a Class B felony, punishable by up to 10 years in prison and a $25,000 fine. The computer offense becomes a Class A felony because the underlying crime is a Class B felony, and is punishable by up to 20 years in prison and a $50,000 fine.

Martin previously pleaded guilty to first-degree theft in 1993 and was sentenced to five years of probation and 100 hours of community service. She also was ordered to pay $27,382 in restitution and “obtain and maintain gainful, verifiable employment” throughout her probation, according to court records.

“This convicted felon was hired by the Department of Education 20 years ago, and for the past eight years was in charge of the lunch program at Aliamanu,” Attorney General Douglas Chin said in a statement. “Kids paid for these school lunches. According to the state, she then pocketed that money.”

Martin’s bail is $11,000, and a bench warrant will be issued for her arrest.

A DOE spokeswoman said Martin was first hired in 1995-96 as an emergency hire as a pre-audit clerk II, a job she had for about two years. Martin’s been at Aliamanu Elementary since her hiring there in 2006-07 as a part-time clerk I. That position was renamed office assistant I in 2011-12.

“The Department of Education brought this case to the attorney general based on our own concerns that possible criminal activity was taking place,” said DOE spokeswoman Donalyn Dela Cruz.