Marcos Santillán

Marcos Santillán, 29, is the brother of Julio Santillán and was also arrested in connection with the illegal sale of fentanyl. He assisted Julio in their illicit drug business, which was uncovered during an undercover operation. The Santillán brothers' involvement highlights growing concerns over the potential for fentanyl to be used recreationally in Argentina, amidst rising statistics of drug seizures involving this potent opioid.