As many as 12 used enema kits have been sold to unsuspecting customers at a CVS drug store in Florida after a man allegedly bought, used and returned them over a three month period. On Thursday 34-year-old Ronald Eugene Robinson was indicted by a federal grand jury in Jacksonville for tampering with consumer products. Police in Jacksonville said a CVS employee grew suspicious of Robinson in June after he was seen continually purchasing and returning the saline laxatives to the store.After first seen purchasing the enemas in March and returning them in April it wasn’t until June 5 that an employee closely examined one of Robinson’s returned boxes and found the products soiled inside. Employees immediately checked additional boxes on the store shelf and found three more in the same condition.The Florida Department of  Health confirmed the bottles testing positive for faecal matter. CVS says 21 customers have since been contacted after suspected of purchasing the products believed to have been resealed at the packages’ bottom with glue. Robinson was arrested on June 15, three days after attempting to return another box of enemas purchased a day before on June 11. The return was denied by the store’s manager who shared a warning with all other CVS stores in the area about their returns. He was later identified and caught through the use of his credit card as well as an employee marking his vehicle’s tag number. ‘The health and safety of our customers is our top priority … If a product appears to have been used or noticeably damaged we do not allow it back on the shelf,’ CVS spokesperson Mike DeAngelis told First Coast News.