Three suspects were arrested Tuesday evening after an undercover investigation in Oakwood led to the discovery of over $17,000 worth of illegal drugs. According to a press release from the Hall County Sheriff’s Office, Tina Ta Bui, 26, of Augusta, Ignacio Mondragon, 30, of Gainesville, and Peggy Lynn Vieira, 39, of Gainesville, are each facing felony charges in the case. Agents with Homeland Security Investigations and the Sheriff’s Office Special Investigations Unit were both involved in the investigation.