Brindlee Mountain urine photo

(Facebook)

Criminal charges could result from an incident at Brindlee Mountain High School where students have been suspended on an accusation they poured urine into a substitute teacher's drink.

Three students remain on suspension pending further investigation into the incident, Marshall County Superintendent Cindy Wigley told AL.com. The investigation was made public Jan. 27.

The investigation has been turned over to the Marshall County Sheriff's Office for consideration of possible criminal charges, Wigley said.

A photo taken with Snapchat showed a student pouring a liquid, claimed to be urine, into a thermos.

Wigley has said school officials confirmed urine was poured into the substitute's thermos, though the teacher didn't drink it. The substitute turned over the drink to administrators after another student alerted her to what happened.

The superintendent said the students will be punished appropriately once the investigation is complete.

Another student, who said on Facebook that she was in the classroom at the time, claimed the incident happened after the substitute teacher told one student he could not go to the restroom.

The student urinated in a bottle, according to the Facebook post. Then, another student took the teacher's drink, and another teen poured the urine into the thermos, the post states.