A newly disclosed surveillance video from the hours before a black man's death in Ferguson at the hands of police has triggered fresh protests.
A filmmaker has released the footage which he says shows Michael Brown did not rob a shop, as police claimed, but instead exchanged marijuana for cigars.
He says it contradicts video released by police showing Brown threatening the shopkeeper as he walks out with cigars.
The 18-year-old was moments later shot dead by a police officer.
However, the convenience store maintains it was a robbery.
Policeman Darren Wilson was cleared of wrongdoing by investigators but the teenager's death in Ferguson, Missouri, led to violent protests and a national debate about lethal police force against African Americans.
On Sunday night, 100 people gathered outside the shop after news emerged of the new video.
The previously unreported footage shows Brown entering the Ferguson Market and Liquor around 01:00 on the day of his death.
He approaches the counter and hands over an item that appears to be a brown bag, and in exchange takes a shopping bag filled with cigars.
After walking towards the door, he then turns around and returns the cigars to the counter before leaving.
Jason Pollock, the filmmaker releasing the tape as part of his documentary Stranger Fruit, says it proves that Brown had not been committing a strong-arm robbery when he returned to that store around noon later in the day.
In that encounter, he is seen shoving store owner Andy Patel before leaving with the cigars.