An 82-year-old Polk County woman is believed to have been a victim of Sue Carswell Hyder and her son, Terry Hyder, who are suspected of defrauding elderly people of money.

FBI investigators have arrested Terry Hyder, of Orlando, Fla., on charges of fraud. Investigators say Terry Hyder cheated families of Alzheimers patients out of $500,000 by selling them fraudulent tax certificates.

His mother, Sue Hyder of Bostic, N.C., was arrested last week after investigators discovered she and other employees were creating fake handicap placards and issuing them to non-disabled people. The Forest City DMV office, where they worked, has been closed during the investigation.

Investigators say they think Terry Hyder met the Polk County victim through his mother, who established a relationship with the victim when she came to the DMV agency in Forest City to get her tag. They say they believe the Hyders defrauded the elderly Polk woman of $120,000.

Federal agents are still investigating the Hyders in an attempt to determine if there are more victims.

The Polk County Sheriffs Office was also involved in the case of the Polk County victim. The Polk County Department of Social Services alerted the sheriffs office in April that an elderly woman had been defrauded of $120,000.