Alaska Fentanyl Ring: Final Two Plead Guilty

ANCHORAGE, AK – The final threads of a dangerous fentanyl and heroin pipeline into Alaska were severed yesterday as Semaj Brown, 34, and Brandon Garrett, 46, both of Anchorage, admitted guilt in federal court. This closes the book on a six-defendant conspiracy that flooded the state with deadly narcotics, according to the U.S. Attorney’s Office.

The investigation revealed a sophisticated network orchestrated by Julio Juarez, 32, and Marcelino Juarez, 30, both of Anchorage, alongside Shane Murphy, 43, of Wasilla, and Gustavo Sebastian Lopez-Chavez, 24, a Mexican national illegally present in the U.S. The group systematically purchased fentanyl and heroin in California, then smuggled it north – often hidden in checked luggage or shipped via the U.S. Postal Service. Marcelino Juarez, Julio Juarez, Brown, and Murphy repeatedly traveled between Alaska and California, bankrolling the drug runs.

The bust began to unfold on August 22, 2024, when U.S. Postal Inspection Service (USPIS) agents flagged a suspicious package headed for an Anchorage address. A subsequent search on August 26, 2024, revealed over two kilograms of fentanyl powder concealed within. A controlled delivery was arranged. Marcelino Juarez was caught picking up the package at a third-party residence and immediately leaving with it in a vehicle, followed by a vehicle carrying Brown. A traffic stop led to Marcelino Juarez’s arrest and the detention of Garrett, who was in the second vehicle. Further investigation linked Brown and Murphy to trips to Los Angeles between July 3-5, 2024, where they sourced the drugs, including from Lopez-Chavez.

On July 6, 2024, authorities at Los Angeles International Airport intercepted a checked bag destined for Anchorage, containing roughly one kilogram of heroin and two kilograms of fentanyl. The bag never made it onto the plane. The net tightened further when the FBI arrested Lopez-Chavez in Los Angeles on November 14, 2024. He was found with a staggering 23 kilograms of fentanyl, a significant amount of U.S. currency, and fraudulent immigration documents. The total haul seized related to this conspiracy now exceeds 36 kilograms of fentanyl and 10 kilograms of heroin.

Marcelino Juarez and Julio Juarez previously pleaded guilty in July 2025, while Murphy entered his guilty plea in April 2025. Lopez-Chavez pleaded guilty in June 2025, and Garrett was indicted in March 2025. The Stockton, California, Police Department identified the Juarez brothers and Brown as known gang members. All defendants face sentencing within the next three months, with Marcelino Juarez, Brown, Murphy, Lopez-Chavez, and Garrett potentially receiving sentences of 10 years to life. Julio Juarez faces a steeper penalty – between 15 years to life – due to a prior attempted murder conviction in California, for which he already served 11 years. The final sentence will be determined by a federal judge.

The takedown was a joint effort led by U.S. Attorney Michael J. Heyman for the District of Alaska, FBI Special Agent in Charge Rebecca Day, Alaska State Trooper Colonel Maurice Hughes, and U.S. Postal Inspection Service Inspector in Charge Anthony Galetti. The investigation serves as a grim reminder of the relentless flow of fentanyl into American communities and the dangers posed by organized drug trafficking operations. The FBI Anchorage Field Office was instrumental in the investigation.