On Monday, ATF agents arrested three men in Texas believed to be responsible for trafficking weapons to the cartel.
Ranferi Osorio, 27, and his brother, Otilio Osorio, 22, were arrested at their home in Lancaster, Texas. Each is charged with possessing firearms with an obliterated serial number.
An additional defendant, Kelvin Leon Morrison, 25, who lives next door to the brothers, is charged with knowingly making false statements in connection with the acquisition of firearms and dealing in firearms without a license.
The Romarm-Cugir Draco, a semi-automatic weapon, has been traced to Otilio Osario, who purchased it from Off Duty Enterprise in Joshua on Oct. 10, the ATF announced. Osario is charged with obliterating the gun's serial number, and initial ballistics tests show it was used in the attack, ATF Spokesman Tom Crowley tells POLICE Magazine.
A confidential informant from the ATF's Dallas office arranged a meeting with the Osorios and Morrison in early November, resulting in the seizure of 40 firearms with obliterated serial numbers, according to the ATF.