Two arrested following undercover drug operation in Marlboro Co. Two were arrested in connection with an undercover drug operation in McColl on Monday. (Source: Storyblocks) By WMBF News Staff | May 10, 2021 at 3:42 PM EDT - Updated May 10 at 3:42 PM Left: Harry James Roller; Right: Heather Renne Lynn Schmidt (Source: Marlboro County Sheriff's Office) MCCOLL, S.C. (WMBF) – An undercover drug operation in Marlboro County ended in the arrest of two people, authorities said. According to information from the Marlboro County Sheriff’s Office, the arrests took place Monday in the Iceman neighborhood within the town limits of McColl following numerous complaints about drug activity.