A Gwinnett County couple was indicted Wednesday and are accused of defrauding Medicaid of more than $600,000, Attorney General Sam Olens’ office said.

A Gwinnett grand jury indicted Derrell Jackson and Shayla Darrington Jackson for allegedly violating the state Racketeer Influenced and Corrupt Organizations Act, of Medicaid fraud and theft.

The husband and wife are accused of submitting false billing to the state Medicaid program for more than three years through their company, Project Focus. The firm provided in-home mental health counseling to youth diagnosed with behavioral disorders.

The investigation revealed that during audits dated January 26, 2009, and May 21, 2009, the Jacksons allegedly presented false progress notes in patient files being reviewed by auditors. Additionally, many of the progress notes were forged using the name of a non-existent employee. In the final analysis, services simply had not been provided as claimed by the Jacksons.

The alleged fraud was discovered when the Jacksons failed to appear for scheduled audits, Olens’ office said.