He also says he was refused an interpreter and was not allowed to call his partner Glenn who is also a qualified lawyer. After eight hours he was eventually allowed to choose his own lawyer.
Miranda also claims that the UK was doing the biding of the US, something which the White House has denied. Although Washington has admitted that they were given a "heads up" by the British.
Miranda seemed perplexed at the number and range of questions he was asked while being interrogated. Most focused on Snowden, Greenwald and Poitras, but also a host of random subjects such as the protests in Brazil, why people there were unhappy and who he knew in the Brazilian government.
Miranda insists that his role in the Snowden-Greenwald affair is minimal and that he had no idea what he was carrying, "I don't even know if it was documents I was carrying. It could have been for the movie Laura was working on."
The Home Office has defended their decision to detain David Miranda.
"The government and the police have a duty to protect the public and our national security. If the police believe that an individual is in possession of highly sensitive stolen information that would help terrorism, then they should act and the law provides them with a framework to do that. Those who oppose this action need to think about what they are condoning," a spokesman said in a statement.
The British police have also defended their actions stating what they did was "legally and procedurally sound."
"The examination of a 28-year old man under schedule 7 of the Terrorism Act 2000 at Heathrow Airport on Sunday was subject to detailed decision making process. Contrary to some reports the man was offered legal representation while under examination and a solicitor attended. No complaint has been received by the Metropolitan Police Service at this time," the Metropolitan Police said in statement.
It was reported in the UK's Daily Mail Monday that Miranda was carrying encrypted documents linked to Edward Snowden's leaks. The Mail, a right-wing pro-British establishment newspaper, did not give a source for the information.
A further twist to the tale emerged after an opinion piece published on Monday by Alan Rusbridger, the editor of the Guardian, that the paper was forced to let British agents into its offices to oversee the destruction of leaked NSA documents after the government threatened the paper with legal action .
Rusbridger said in an interview with the BBC's World at One on Tuesday that the Guardian has held back a "great deal" of material on national security grounds and that this had been acknowledged by Whitehall. He also said that Greenwald writes in a very "careful meticulous way" and that people should not take his threat to write more damaging material about Britain's spies too literally.
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