Published: Nov 04, 2013 4:43 PM EST
Updated: Nov 04, 2013 4:48 PM EST

FORT MYERS, Fla. - Delmer Parrish and his mother, Patricia Parrish, told the judge they knew what they did was wrong. Their crime? Writing fake prescriptions while running Sunshine Pharmacy in Naples, in order to pocket the cash for themselves.

Outside the federal courthouse, where the two plead guilty, the mother and son were quiet. Originally the pair plead not guilty in May.  When asked why they changed their plea Monday, their attorney, Dale Freeman replied.

"We'll hear it at sentencing, explain quite a bit."

The pair submitted claims that were never ordered by doctors, and are charged with defrauding Medicare, Medicaid, and Tricare, over a period of 3 years.

When the judge asked Patricia Parrish why she did it, Parrish said the pharmacy needed the money to operate. As part of the deal, Delmer was forced to give up his pharmacy license. He also admitted to the judge that he had been addicted to prescription medicine until recently.