DENVER (CBS4) — Cable news network Al Jazeera America says it is shutting down just 2 1/2 years after its launch and weeks after a controversial documentary that tried to link Denver Broncos quarterback Peyton Manning to human growth hormones.

Called “The Dark Side,” the Al-Jazeera documentary raised questions as to whether Manning used the banned substance human growth hormone known as HGH.

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Something Manning vehemently denied to ESPN, “That stings me that that guy insinuates that I broke rules… That’s a joke.”

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The documentary claims the HGH came from this Indianapolis clinic. A former intern, Charles Sly, claimed the HGH would be delivered to Manning’s wife Ashley. Al-Jazeera recorded the statements on a hidden camera.

But Sly himself has taken back what he said.

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“I am recanting any such statements,” Sly said in a YouTube clip.