The Polk County Sheriff’s office has charged Brittany Crockett, 27, of Butter Street in Landrum, with first-degree murder in the death of Jeffrey Scott Brittain, 51, of Mill Spring.

Brittain was admitted to Rutherford Regional Medical Center, under the assumption that he was having an allergic reaction to medication he was taking.

According to a statement released by the Polk County Sheriff’s office, doctors were unable to diagnose the cause of his deteriorating condition.

Brittain’s condition became irreversible, causing him to pass away the morning of Wednesday, August 5.

Brittain’s family notified Captain BJ Bayne suspected poisoning. After conducting interviews, the Polk County Sheriff’s office determined that Crockett gave Brittain an undisclosed substance.

The Federal Bureau of Investigations Laboratory in Quantico, Virginia will receive a sample of the substance and determine its contents.

Crockett appeared in court on Wednesday, August 5 and was denied bond.

Crockett’s next court appearance will take place on August 26.