Police in Missouri have released a video that appears to show a black teenager brandishing a gun before he was shot and badly wounded by officers.
Police said the short clip from a security camera showed Tyrone Harris, 18, grabbing a gun from his waistband.
Mr Harris’s father has said his son was unarmed and was running away from police when he was shot on Sunday.
Tyrone Harris was fired on during protests in Ferguson to mark a year since the killing of Michael Brown.
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