“Do you know right from wrong?” Gadhafi added on the video shortly before he appears to lose consciousness.

“Shut up, dog,” one of the former rebels responded…

“It is unclear how he died. There is a need for an investigation,” U.N. human rights spokesman Rupert Colville told reporters in Geneva.

“It is a fundamental principle of international law that people accused of serious crimes should if possible be tried. Summary executions are strictly illegal. It is different if someone is killed in combat,” he added.