A number of documents have been released to defence lawyers for George Zimmerman, who is accused of second-degree murder over the 26 February killing of Trayvon Martin in Sanford, Florida.

Among the newly released evidence is video from a 7-Eleven where Trayvon Martin bought Skittles and iced tea, just before he was shot dead during a confrontation with the neighbourhood watchman.

Mr Zimmerman, 28, maintains he shot the 17-year-old in self-defence.