A Rockdale County sheriff’s deputy resigned Sunday after her arrest for allegedly driving drunk and causing a wreck that injured two people.

Frances Helen Farmer, 27, of Conyers, was charged with DUI and failure to maintain lane after the wreck, which happened shortly after 3 a.m. on Zingara Road, Chief Deputy Scott Freeman with the Rockdale sheriff’s office said Monday.

Investigators believe Farmer was driving a 2010 Ford pickup truck on a curve when the truck left the roadway and struck several trees, according to a spokeswoman for the Georgia State Patrol.

Two passengers inside the truck were transported to Atlanta Medical Center for treatment, Franka Young with the GSP said Monday. The sheriff’s office requested assistance from the GSP because the wreck involved one of its deputies, Freeman said.

“In any case where we have an RCSO deputy that has been involved in an accident, especially with the suspicion of DUI, we request the GSP to investigate in order to ensure complete transparency and objectivity,” Freeman said in an emailed statement Monday.

Farmer was booked into the Rockdale County jail and released Saturday afternoon after posting bond. She was placed on administrative leave before resigning Sunday following an internal hearing, Freeman said.

“This is an unfortunate incident in which one of our deputies made some very poor decisions, but we are very fortunate that no one was killed,” Freeman said.