GILLETTE (WNE) — The Campbell County Sheriff’s Office is investigating after a woman tested positive for a controlled substance after drinking what she believed to be Kool-Aid.

A 56-year-old woman who is an inmate at the Campbell County Jail tested positive for amphetamines during a drug test. A detention officer mistakenly threw this sample away, but she provided another sample.

A detention officer found a clear sandwich bag with a white powdery substance in the woman’s cell, said Sheriff Scott Matheny.

The woman, who has been in the jail since June, said she didn’t know that she tested positive for amphetamine, and that the substance in the bag was Kool-Aid powder that was given to her the day before by another inmate who was released.

She said she drank some of the Kool-Aid Tuesday afternoon, and denied intentionally using drugs. She said she would be willing to do another drug test.

The powder weighed 7 grams with packaging. In a test for methamphetamine and amphetamine, the results came back positive. In another test for methamphetamine and MDMA, the results were negative, Matheny said.

The Wyoming Division of Criminal conducted its own test and determined the substance was confectioner’s sugar.

The powder will be sent to the state crime lab for further testing.