Man Pleads Guilty to Role in Massive Minnesota Meth Bust

Guillermo Mercado-Chaparro admits involvement in one of the largest drug seizures in state history.

Published on Mar. 6, 2026

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Guillermo Mercado-Chaparro has pleaded guilty to one count of conspiracy to distribute methamphetamine after authorities seized nearly 900 pounds of meth from two vehicles in St. Paul last July. Mercado-Chaparro was one of two men federally indicted in what officials called "one of the largest" drug busts in Minnesota history.

Why it matters

This case highlights the ongoing battle against the opioid crisis and the massive scale of drug trafficking operations, even in smaller Midwestern states like Minnesota. The large quantity of meth seized suggests a sophisticated distribution network that authorities were able to disrupt.

The details

According to court documents, an undercover police officer bought a pound of meth from Mercado-Chaparro, leading to surveillance that observed him receiving two large bags from his truck and placing them in a nearby Jeep. Police then stopped the Jeep, which was carrying over 250 pounds of meth, and searched Mercado-Chaparro's truck, where they found an additional 630 pounds of the drug.

  • In July 2025, Mercado-Chaparro was arrested and charged.
  • On March 6, 2026, Mercado-Chaparro pleaded guilty to one count of conspiracy to distribute methamphetamine.
  • On March 24, 2026, Mercado-Chaparro's co-defendant, Joel Casas-Santiago, has a plea hearing scheduled.

The players

Guillermo Mercado-Chaparro

One of two men federally indicted in what officials called "one of the largest" drug busts in Minnesota history, Mercado-Chaparro has pleaded guilty to one count of conspiracy to distribute methamphetamine.

Joel Casas-Santiago

Mercado-Chaparro's co-defendant, who has a plea hearing scheduled for March 24, 2026.

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What’s next

A sentencing date has yet to be scheduled for Mercado-Chaparro, and his co-defendant Casas-Santiago has a plea hearing scheduled for March 24, 2026.

The takeaway

The seizure of nearly 900 pounds of meth in this case underscores the significant challenge law enforcement faces in combating the flow of illicit drugs into communities, even in less populated regions of the country. This bust represents a major disruption to a large-scale drug trafficking operation.