New footage has emerged of Mark Duggan being shot, in which paramedics can be seen attending to Duggan and his body lying on the pavement covered in a red blanket.
The video footage obtained by the BBC was filmed by someone who claimed to have witnessed the shooting, which ended up triggering the London riots last summer.
Duggan was killed during a police action involving officers from the Metropolitan Police's Trident gun crime unit in Tottenham on 4 August.
The witness, who preferred to remain anonymous, was heard on the tape saying that Duggan jumped out of a car and police twice shouted: "Put it down," according to the BBC report.
"They blocked him in, they blocked him in. He jumped out... And then he's taken out, shot him... because I heard them shout at him yeah, put it down, put it down," the voice on the tape says. An audio expert helped the BBC analyse the tape since parts of it were inaudible.
Duggan, a father of four, was travelling in a mini cab when it was stopped by the Metropolitan Police's Operation Trident, which was a planned operation. The officers, including the firearms team CO 19, were investigating gun crime affecting black communities.
Two shots were fired from a police gun and Duggan died from a single gunshot wound to the chest, according to the commentary on the tape.
The video appeared to have been filmed from the window of a building on the opposite side of the road.
The footage shows a minicab in which Duggan was travelling, three unmarked police cabs and the paramedics who are trying to resuscitate Duggan, who was lying on the pavement.
It also shows the firearms officers wearing baseball caps moving around the scene and buses in the area.
The Independent Police Complaints Commission (IPCC), which is carrying out an investigation into the incident, criticised the BBC for broadcasting the contents of the tape before investigators had opportunity to view it.
"Given this, it is particularly disappointing that BBC News did not afford us the opportunity to view this footage in advance of broadcast, despite our repeated requests," IPCC commissioner Rachel Cerfontyne said in a statement.
"Broadcasting this footage is likely to have caused considerable distress to Mr Duggan's family, friends and the local community, in addition to potentially prejudicing our investigation and any legal process that may follow. We have asked the BBC to pass our contact details to the witness and would urge them to come forward. We fully expect BBC News to now pass us the unedited footage so we are able to fully assess its implications," the statement said.
Duggan's family was informed about the footage before it was broadcast, the BBC said.
"Requests for BBC untransmitted material are dealt through our legal department, regardless of the subject matter. We require requests for untransmitted material to be made through the courts," a BBC spokeswoman said.