Police release body camera video of an officer killing gunman who killed eight

People raise their hands as they leave a shopping centre after a shooting on May 6 in Allen, Texas (LM Otero/AP)

Police have released footage of an officer killing a neo-Nazi gunman, quickly ending a mass shooting that left eight people dead and seven others hurt at a Dallas shopping centre.

The edited five-and-a-half-minute video details the final moments of Mauricio Garcia, 33, after he unleashed a rain of bullets from an AR-15-style rifle at the Allen Premium Outlets on May 6.