Who killed Gaddafi's son and how is the future of Libya affected?

Saif al-Islam Gaddafi, son of former Libyan dictator Muammar Gaddafi, was killed in his home in Zintan by masked gunmen. The assailants disabled security cameras and fatally shot him, according to Libyan authorities. Gaddafi's political group has condemned the assassination, and an investigation has been launched. He was previously considered a potential presidential candidate and a symbol for those nostalgic for the old regime. His death could potentially destabilize Libya further, which is already divided between rival governments and armed groups.