The suspect named John Ogais, aka Rambo, was traced to a reception centre in Calabria in southern Italy and clapped in cuffs on charges of belonging to a transnational smuggling ring, specialising in human trafficking, murder and rape.
Detectives in Agrigento in Sicily have pulled together witness testimony from migrants who accuse Ogais of torturing people held captive in a makeshift prison, with at least two men reportedly dying at his hands.
Many of those rescued from flimsy dinghies in the Mediterranean as they try to make the perilous trip to Europe, bear torture scars and tell rescuers they had no choice but to flee for their lives from the crisis-hit African country.
"While I was inside that ghetto, where it was impossible to escape, I heard that a man who called himself Rambo had killed a migrant," one of the witnesses said according to the police statement.
"My cousin and others tried to escape but they were caught and tortured nearly to death," the witness said.
"The man was killed by Rambo in front of the victim's brother. When he killed the man Rambo pointed a gun at the brother and told him not to tell his family anything and to get them to immediately send money for their release."
Libya has long been a stepping stone for migrants seeking a better life in Europe.
Photo credit: Italian media