1Ismael "El Mayo" Zambada Garcia: The Head of the Sinaloa Cartel
Even after son Vicente and top lieutenant El Chapo are arrested, reputed Sinaloa Cartel chieftain El Mayo is suspected of ruling his region of Mexico.
2Félicien Kabuga: The Financer of the Genocide in Rwanda
Accused of financing the Rwandan genocide in the '90s, Félicien Kabuga spends decades eluding authorities.
3Samantha Lewthwaite: The White Widow
A Muslim convert born in the UK, Samantha Lewthwaite denounces the 7/7 London subway attack. Later, she's suspected of masterminding acts of terror.
4Semion Mogilevich: The Russian Mafia Boss
Semion Mogilevich, who's believed to be the "boss of bosses" in the Russian mob, is run out of Hungary and back to Russia. He remains powerful and free.
5Matteo Messina Denaro: Cosa Nostra's Last Godfather
Suspected of orchestrating the murders of two judges and a series of terror attacks in 1993, Matteo Messina Denaro is still a fugitive at large.