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.

4. Semion 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.

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.