An investigation into Muammar Gaddafi’s violent death last year has challenged the version of events given by Libya’s new rulers.
Human Rights Watch commented on the gruesome footage showing the ex-dictator being mocked and beaten.
Officials initially said he was killed in crossfire. The new report says in the film he “appears lifeless” after his capture.
The campaign group’s report also accuses former rebels of beating and executing dozens of Gaddafi supporters.
“There cannot be acquiescence by the government to allow such crimes to go unpunished. That is very dangerous moving forward, because that, in a sense, gives the message that these kinds of abuses against former Gaddafi or pro-Gaddafi affiliated – whether security forces or politicians or citizens – that that will go unpunished, that that will be accepted. And that can give a green light to the kind of targeted assassinations we’ve seen in the east of Libya for example,” said Heba Morayef, Middle East and North Africa researcher for Human Rights Watch.
The bodies of Gaddafi and his son were put on display in Misrata, a town that had been heavily shelled by government forces.
The new Libyan authorities promised to investigate how they were killed, but Human Rights Watch says little has been done.
It claims to have evidence that opposition militias summarily executed at least 66 members of Gaddafi’s convoy in the town of Sirte.