Badr, along with 61 supporters of ousted president Mohamed Morsi, were acquitted on Sunday by an Egyptian court. They had been accused of staging riots last July in central Cairo's Ramses Square.
Three Al-Jazeera reporters, including Australian Peter Greste, are still being detained by Egyptian authorities on terrorism-related charge after being arrested on December 29 in a Cairo hotel.
Salah Negm, director of news at Aljazeera English, says the charges are fabricated.
"It's actually fabrication and nonsense and intimdation and irritation of journalists in order to get one side of the story coming from Egypt only," he told BBC Newsnight.
On Wednesday, Egyptian prosecutors referred 20 people – including a number of AlJazeera journalists – to a criminal court on charges of "fabricating and disseminating reports suggesting that Egypt was in a state of civil war."
President Barack Obama's spokesman Jay Carney has said the detention of the journalists was "of deep concern" to the US administration.
"The restrictions on freedom of expression in Egypt are a concern, and that includes the targeting of Egyptian and foreign journalists and academics simply for expressing their views."
"These figures, regardless of affiliation, should be protected and permitted to do their jobs freely in Egypt."
Carney said that the US had expressed its views to the Egyptian government and strongly urged it to drop the charges against the journalists and release them.
