A 15-year-old girl was sickened at the Flowery Branch High School homecoming dance on Saturday, Oct. 6, when her drink was possibly spiked with an unknown drug.

A preliminary investigation by the Hall County Sheriff’s Office revealed that the girl had consumed at least one cup of lemonade before growing sick with a headache, amnesia, skin rash and vomiting. The girl is expected to make a full recovery.

“The girl’s mother responded to the dance and took her daughter to the hospital,” the Hall County Sheriff’s Office reported in a press release on Tuesday, Oct. 9. “The victim’s date and his mother followed them to the hospital and remained with them. Investigators do not consider the victim’s date a suspect in the case.”

The school district is offering a $1,000 reward for information that leads to the identification and arrest of anyone responsible.

Investigators reviewed surveillance footage from the dance but found no evidence of any person tampering with the lemonade served at the event.  

“She reportedly received the drink in a hallway or classroom, but has no recollection of who gave it to her,” according to the Sheriff’s Office. “The drink was dispensed out of large coolers or jugs with sealed lids. The concessions area was monitored by a teacher for the duration of the event.”  

The Sheriff’s Office and Hall County School District are working together as law enforcement continues to investigate the incident.  

“Student safety is a top priority of the Hall County School District, and behaviors which endanger the safety of any of our twenty-eight thousand students will not be tolerated,” Hall County School District Superintendent Will Schofield said in a statement.