SC Interstate Interdiction — SLED, SC Highway Patrol, County Sheriffs

Last verified: May 2026

The Major Interdiction Corridors

I-95 — East Coast Main Corridor

I-95 runs north-south along the East Coast through Florence (intersection with I-20), through SC counties Marlboro, Dillon, Florence, Clarendon, Williamsburg, Berkeley, Dorchester, Colleton, Hampton, Jasper. The corridor is the principal cross-border-cannabis-trafficking route from FL/GA northbound to NJ/NY/MA adult-use markets. SC enforcement focuses on:

• Florence County: I-95 + I-20 intersection — among the highest-volume corridors in the southeastern U.S.
• Hampton County: I-95 south of Walterboro.
• Jasper County: I-95 just north of GA border.
• Marlboro County: I-95 just south of NC border.

I-26 — Charleston-Columbia-Asheville

I-26 runs from Charleston west through Summerville, Columbia, Spartanburg into NC toward Asheville. The corridor handles substantial Upstate-Lowcountry traffic and EBCI Cherokee NC cross-border returnees.

I-77 — Charlotte Exurb to Columbia

I-77 runs from NC (Charlotte) south through Rock Hill, Chester, Columbia. Connects to I-26 at Columbia. Charlotte exurb commuter traffic and cross-state-line cannabis-related encounters concentrate here.

I-85 — Atlanta-Charlotte through Upstate

I-85 runs from Atlanta northeast through Greenville, Spartanburg into NC toward Charlotte. The corridor is the principal manufacturing-economy interstate in SC. Cross-border traffic from GA (low-THC) and NC (limited medical) moves through Upstate SC.

I-20 — Atlanta-Florence

I-20 runs east-west from Atlanta through Augusta GA, into SC at Aiken, through Columbia, to Florence at the I-95 intersection. The corridor is a major east-west cannabis-trafficking route from Atlanta and points west to East Coast markets.

SC Enforcement Agencies

SLED (State Law Enforcement Division)

SLED is the principal SC state-law-enforcement agency. Cannabis-related responsibilities include:

• Drug-task-force coordination across counties.
• Operation Ganjapreneur hemp-derived intoxicant enforcement (under AG Wilson’s leadership; SLED implementation).
• Forensics laboratory drug-testing.
• Civil-asset-forfeiture coordination.
• Major drug-trafficking investigations.

SC Highway Patrol

Under the SC Department of Public Safety. Conducts active interstate-corridor interdiction with K-9 deployment.

County Sheriffs

Florence County, Horry County, Charleston County, Richland County, York County, Greenville County, Spartanburg County sheriffs all conduct cannabis-related enforcement within their jurisdictions plus contribute officers to multi-jurisdictional drug task forces. Florence County in particular operates substantial interstate-interdiction units focused on the I-95 / I-20 intersection.

Common Stop Patterns

• Out-of-state plates from adult-use states: NJ, NY, MA, VA, MD, WA, CO, CA stopped at higher rates.
• Pretextual stops: minor traffic infractions (following too closely, signal violations, speeding, equipment violations, lane-touching) used as basis for stop.
• K-9 deployment: free-air sniff during lawful stop is not Fourth Amendment "search" per Illinois v. Caballes, 543 U.S. 405 (2005). Prolonging a stop for K-9 deployment without independent reasonable suspicion violates the Fourth Amendment per Rodriguez v. United States, 575 U.S. 348 (2015).
• Cannabis odor as probable cause: officer-asserted odor regularly cited as probable cause for vehicle search.
• "Ruse" checkpoints: signs warning of an upcoming drug checkpoint that doesn’t exist, prompting evasive behavior.

Common Charges in Interdiction Cases

• Possession over 1 oz: PWID felony under § 44-53-370.
• Concentrate any amount: Class C felony.
• Trafficking 100-2,000 lbs: 25-year mandatory minimum.
• Tax-stamp violation: separate felony exposure.
• Paraphernalia: civil violation.

Civil Asset Forfeiture

SC civil-forfeiture proceedings allow seizure of vehicles, cash, and real property used in connection with controlled-substance violations. Forfeiture proceedings run parallel to criminal cases. Cross-border-interdiction stops are a principal source of civil-forfeiture filings in SC. Defense bar regularly raises Eighth Amendment proportionality and due-process challenges to civil-forfeiture overreach.

Practical Driver Notes

• Decline consent searches. "I do not consent to a search" is the lawful response.
• Record the encounter. Smartphone video is permitted in most circumstances.
• Get counsel immediately if stopped.
• Do not transport cannabis across the SC state line. Federal felony plus PWID felony plus concentrate Class C felony plus civil-forfeiture exposure.
• Florence County I-95 / I-20 intersection is the highest-volume interdiction zone in SC.

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