Why did Saif al-Islam Gaddafi have to die?

Saif al-Islam Gaddafi was shot 19 times inside his compound in Zintan, a mountain town in western Libya, where he had lived since his capture in 2011. Four masked men entered the compound after disabling the security cameras. Roughly 90 minutes earlier, his guards had withdrawn from the area for reasons that remain unexplained. When the shooting ended, the assailants di...