Four defendants in a MARTA fraud scheme are due in court Monday in DeKalb County.

Defendants accused in MARTA 'Underground Railroad' scam due in court

Four defendants in the so-called "Underground Railroad" MARTA fraud scheme are due in court Monday in DeKalb County.

Robert Clark, Christina Carney, Stephanie Finger and Jedadia Byrd will stand for a reading of the charges, according to the district attorney's office. If they don't plead guilty, they'll head to trial soon.

The elaborate scheme is said to have taken place in 2013, when MARTA computers were hacked. Authorities believe $1 Breeze fare cards were purchased and fraudulently loaded with much higher values.

RELATED: Man charged with performing sex act on MARTA train

RELATED: Woman strangled to death at DeKalb hotel, 'person of interest' sought

RELATED: Sordid high-profile case of lover's murder heads to trial in DeKalb

The defendants then sold the cards at a discount to riders, pocketing the difference, authorities have said.

Defendant Michael Dallas pleaded guilty in 2015 to racketeering and agreed to serve two years in prison with credit for the time he’d already served. He was described as a low-level player in the massive scheme.

Distributors were allegedly stationed selling the cards at various MARTA terminals, including H.E. Holmes, Five Points, Chamblee and Doraville.

The four defendants are going before Judge Mark Anthony Scott in courtroom 6A, Clark at 8:30 a.m., the others at 1 p.m.

Like DeKalb County News Now on Facebook | Follow on Twitter and Instagram

Support real journalism. Support local journalism. Subscribe to The Atlanta Journal-Constitution today. See offers.

Your subscription to the Atlanta Journal-Constitution funds in-depth reporting and investigations that keep you informed. Thank you for supporting real journalism.