Mexican Cartel Leader Pleads Guilty to Supplying Fentanyl Heroin and Cocaine into South Carolina

FLORENCE, S.C. — Rafael Contreras Ramos, a 40-year-old leader of a Mexican drug trafficking organization, pleaded guilty Tuesday to conspiring to distribute controlled substances after supplying dozens of kilograms of fentanyl, heroin, and cocaine from a Mexican cartel into Horry County, South Carolina.

The plea covers multiple shipments of fentanyl, heroin, and cocaine that reached local distributors in Horry County, one of South Carolina’s easternmost counties and a growing hub for opioid distribution along the I-95 corridor. Federal prosecutors did not disclose the exact kilogram totals in the charging documents, but the quantities triggered felony conspiracy charges carrying multi-year mandatory minimum prison terms.

Prior to the plea, Contreras Ramos faced indictment on the conspiracy count. The guilty plea changes his legal status from defendant to convicted felon; sentencing is now scheduled under federal guidelines that impose at least five years and up to 40 years in prison depending on final drug-weight calculations and criminal history. Sentencing has not yet been calendared.

Downstream, the conviction requires the U.S. Attorney’s Office to prepare a presentence investigation report and allows federal agents to use Contreras Ramos’s cooperation — if any — to target remaining members of the Mexican organization. The case also obligates the Drug Enforcement Administration to update its intelligence dossiers on the specific cartel cell, potentially accelerating extraditions or follow-on indictments in other U.S. districts where the same network operates.

Horry County law-enforcement agencies will receive formal debriefs on the trafficking routes established by the organization.

This marks the latest conviction in a series of South Carolina federal cases targeting Mexican cartel fentanyl pipelines. The Department of Justice has pursued similar conspiracy prosecutions against Mexican nationals supplying the Southeast, following the 2022 designation of fentanyl as a primary national drug threat.