This post has been updated.

Libyan leader Moammar Gaddafi's most prominent son, Saif al-Islam. (Chris Helgren/Reuters)

Saif Gaddafi had been seen as the heir apparent to his father. A fluent English speaker, Gaddafi once was considered as Libya’s liaison to the West. In 2008, he called for political reform in his country.

However, during the civil war, Saif Gaddafi played a large role in the crackdown of the rebels. In one of the more dramatic twists in the war, when Tripoli appeared poised to fall to the rebels, Saif Gaddafi appeared outside a compound in the capital city, shaking hands with loyalists and telling the Western media that his family was still very much in control of the country.

Saif Al-Islam Gaddafi, son of Moammar Gaddafi, greets supporters in Tripoli on Aug. 23, 2011. (Paul Hackett/Reuters)