Elko Man Pleads Guilty to Trafficking 140 Guns, Including .50 Cal Rifles, to Mexican Cartels

Luis Alberto Osorio of Elko, Nevada pleaded guilty Friday to running a firearms pipeline that fed some of the most violent drug cartels in Mexico.

According to the U.S. Attorney's Office for the District of Nevada, Osorio and unnamed co-defendants bought 140 firearms, magazines and ammunition between April 1, 2020 and September 17, 2025, on behalf of people affiliated with Mexican drug trafficking organizations. The guns were resold south of the border for profit.

These weren't hunting rifles. Court documents list the Ohio Ordnance Works M2-SLR .50 BMG, Barrett M82A1 and M107A1 .50 BMG anti-materiel rifles, the FN Herstal M249S 5.56x45mm light machine gun, and the FN Herstal SCAR 17S 7.62x51mm rifle. The Barrett .50 cal can punch through light armor and vehicles from over a mile away. This is battlefield hardware, not home defense.

Osorio pleaded guilty to one count each of straw purchasing of firearms, trafficking in firearms, harboring certain aliens, and conspiracy to launder money. Combined, those charges carry a maximum of 70 years in prison, according to the DOJ. Sentencing is set for February 11, per the U.S. Attorney's Office and 2news.com, though 2news lists the year as 2027 while the Las Vegas Sun and Fox News simply say "February" without specifying the year.

Beyond the gun trafficking, Osorio admitted to employing people illegally in the U.S. at a Nevada mining company, according to Fox News and the DOJ release. The same network wasn't just moving weapons, it was profiting off illegal labor domestically while arming cartel operations abroad.

First Assistant U.S. Attorney Sigal Chattah for the District of Nevada didn't mince words. "Firearms trafficking networks feed the violent cartels that terrorize border communities and pump illicit drugs into our neighborhoods," Chattah said. "By cutting off this supply chain and holding this defendant accountable, we are directly disrupting the operational capabilities of these dangerous criminal organizations."

Jonathan Sherwin, deputy special agent in charge of Homeland Security Investigations in Las Vegas, echoed that framing, calling the guilty plea the result of "relentless work by HSI and the Homeland Security Task Force and our federal, state and local partners to disrupt the flow of weapons, money and criminal support that allows these organizations to operate."

ATF Special Agent in Charge John Wester of the San Francisco Field Division also weighed in, calling the case an example of coordinated task force work, according to 2news.com. The investigation pulled in agents from the FBI, HSI, DEA, ATF, IRS Criminal Investigation, Las Vegas Metro Police, the U.S. Marshals Service, and the Nevada Gaming Commission, per that same report.

The Las Vegas Sun, citing court records, adds a detail the other outlets skip entirely: Osorio was released from custody on a personal recognizance bond back in September 2025, and on August 14 a court modified his release conditions to remove location monitoring and expand his approved travel area to the entire continental United States. For a man who admitted to arming cartels with .50 caliber rifles capable of downing helicopters, this raises a fair question about how pretrial release conditions are calibrated in cases involving this level of firepower.

None of the government releases name Osorio's co-defendants, and it's unclear from available court documents how many people were charged alongside him or what happened to their cases. The DOJ's press materials treat this as a single high-profile guilty plea, but a conspiracy spanning five years and 140 firearms almost certainly involved more people than just Osorio.

The case is being tied by Fox News to the Homeland Security Task Force initiative, which the outlet notes was created by an executive order President Trump signed on his first day back in office. That's a fair contextual point. Whether credit belongs to any particular administration's policy or simply to years of accumulated investigative work by career HSI, ATF, and FBI agents is a separate question the sourcing doesn't fully answer.

A Nevada man moved anti-materiel rifles capable of destroying vehicles and light armor into the hands of cartel-affiliated buyers for half a decade before getting caught. The open question now is who else was in that supply chain, and whether the co-defendants referenced in court filings will face public charges of their own before Osorio's February sentencing.