Moammar Gadhafi's wife is calling on the United Nations to investigate the death of the fighter Moammar and Mutassim.

Gadhafi and his son Mutassim were killed in the battle of Sirte on Thursday after National Transitional Council (NTC) fighters pulled Gadhafi from his hiding spot inside a drain pipe. The official cause of death was ruled as a gunshot to the head, but the actual details of how and when he died are still mysterious.

The former dictator was killed somewhere in transport between Sirte and Misrata, and there have been a number of conflicting stories about what happened.

Gaddafi's wife Safia Farkash told Al Arrai television that she was proud of her husband's courage, according to Reuters. Moammar and Mutassim Gadhafi's bodies are currently in a meat refrigerator in Mistrata, awaiting a yet-to-be scheduled burial.

Both Amnesty International and the United Nations have already called on Libyan leaders to conduct a full investigation into Gadhafi's death.

More details are needed to ascertain whether he was killed in some form of fighting or was executed after his capture, said Rupert Colville, a spokesman for the U.N. High Commissioner for Human Rights.

The two cell phone videos that have emerged, one of him alive, and one of him dead, taken together are very disturbing.

You can't just chuck the law out of the window, he told The Associated Press. Killing someone outside a judicial procedure, even in countries where there is the death penalty, is outside the rule of law.

Libya's Interim Prime Minister Mustafa Abdul Jalil claimed that Gadhafi was killed when loyalist fighters fired machine guns at the NTC open-bed truck carrying Gadhafi to Misrata. According to Jalil, Gadhafi then died from wounds to the head, chest and legs. Yet the soldiers who capture Gadhafi have a different version of the story, and at least three separate fighters now claim that they personally killed the ousted dictator.

While most world leaders have praised the capture and death of Gadhafi, which has marked the end of the Libyan revolution and the beginning of the reconstruction process, Iranian President Mahmoud Ahmadinejad said he was happy for the Libyan people but criticized the violence in the country.

When asked in an interview with CNN's Fareed Zakaria about what Gadhafi's death means for Libya, Ahmadinejad side-stepped the question and used his answer to attack NATO.

The will of the people should work and prevail everywhere. We think it is the will of the people that should work and prevail everywhere -- justice, freedom and respect to people. This is the right of all nations. But, of course, we feel very sorry that people are being killed, everybody. I wish everybody would respect justice freedom and there was no need for any conflict or clash, Ahmadinejad. told CNN.

In the beginning, we recommended a dialogue between the two sides and all parties, but they did not pay attention to our recommendations. And, of course, NATO intervention was effective in exacerbating the conflict. We have not received any statistics about the losses from both sides and I think instead of intervention, NATO could help to promote a dialogue among all parties.