1. Ismael "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.

2. Félicien Kabuga: The Financer of the Genocide in Rwanda

Accused of financing the Rwandan genocide in the '90s, Félicien Kabuga spends decades eluding authorities.

3. Samantha 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.

5. Matteo 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.