Libya: Gaddafi regime atrocities revealed

As the Libyan capital falls from the Gaddafi regime's grasp, evidence is emerging that the government dealt ruthlessly with its opponents.

Atrocities appear to have been carried out by Gaddafi's forces in the days before the fall of Tripoli.

Heavy fighting has continued in parts of the the city, which is now almost entirely in the hands of rebel fighters.

John Simpson reports.