Complex sentence: Sanchez whose nationality is believed to be Colombian or Panamanian is the biggest drug lord of the Americas from the north of Alaska to Tierra del Fuego in Chile, who specializes in cocaine.
Split into simpler sentences: Sanchez whose nationality is believed to be Colombian or Panamanian is the biggest drug lord of the Americas. His empire stretches from the north of Alaska to Tierra del Fuego in Chile, and he specializes in cocaine.