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New video of the man who killed an African-American teenager in the US state of Florida has raised new questions about what happened the night that Trayvon Martin lost his life.

George Zimmerman, a self-appointed neighbourhood watchman, says he shot the 17-year-old Martin in self-defence after the young man attacked him on the street, leaving his face bloodied.

But the release of a new video shows Zimmerman arriving at the local police station without signs of blood on his face or clothes, as he had claimed.

Al Jazeera's Andy Gallacher reports from Miami.

Source: Al Jazeera