A 32-year-old South Carolina assistant teacher has been arrested on charges he surreptitiously sprayed his school with a substance that smells like poop, sickening students and causing more than $55,000 in damages, authorities said.

Alexander Paul Robertson Lewis allegedly dispensed the substance at West Florence High School in Florence, South Carolina, over a nearly monthlong span, leaving school officials mystified as to the origin of the foul odor, the Florence County Sheriff's office said in a statement.

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