Police made a grim threat before executing the 17-year-old whose death has sparked uproar across France this week.
Another young man accompanying Nahel Merzouk, who is of Algerian and Moroccan descent, has come out to say that he wants to set the story straight because "there are a lot of lies on social media".
The passenger has insisted that neither boy was "under the influence", but they'd borrowed the vehicle - which had Polish plates - and that they were simply driving around the suburb of Nanterre when cops on motorbikes pulled them over.
One of the cops approached Nahel's window, before telling him: "Cut the engine or I'll shoot you."
The officer then smashed the teen in the face with his weapon, before another cop followed suit, he revealed in a video shared on social media.
The first cop then pressed the barrel against his head, telling him: "Don't move or I'll put a bullet in your head".
The second officer then said "shoot him", before the first hit him again with the butt of the gun.
When this happened, Nahel released the break and the second officer shot him, the passenger said.
"I saw him in pain, he trembled," Nahel's friend said. "We hit a barrier."
"I was afraid. I got out of the vehicle. And I ran away. I thought they might shoot me. So I ran."
"I'm shocked at what happened in front of me to my friend," he added.
The revelation comes on the same day that thousands of mourners gathered to lay Nahel to rest in the Paris suburb of Nanterre.
His mum Mounia asked for the funeral to be private and the press were not allowed to attend.
But many friends and family visited a funeral home where his body was kept overnight before marching peacefully to a service at a mosque on George Clemenceau Avenue.
He was buried in a local cemetery this afternoon.
His death has had an enormous impact across the whole country with French President Emmanuel Macron calling off his scheduled visit to Germany as a result of the unrest.
It was due to be the first state visit to Germany by a French president in 23 years, and was scheduled to last from tonight until Tuesday.
Tuesday's killing set off a series of riots that have torn Paris apart in recent days.
Pressure mounted overnight on Friday for President Emmanuel Macron to declare a state of emergency as the violent protests continued.
A gunman opened fire on police and a weapons shop was looted as riots continue to escalate in France.
An officer in Villeurbanne, near Lyon, described how ‘gunfire started’ as a police patrol entered a council estate where tower blocks had been set alight in the early hours of this morning.
"We were forced to flee - it was a matter of life and death," he said.
"Three officers suffered minor wounds, but it could have been far worse.
"We were forced to shoot back with a tear gas grenade launcher, at the risk of tearing a rioter’s head off,’ added the policeman, who asked not to be identified by name.
Officers suffered wounds to the legs and groin, prompting a local police spokesman to say: "We have crossed a red line. We've not seen this kind of thing before here, and it's of deep concern."
There were more than 1,300 arrests across France overnight between Friday and Saturday, when businesses looted included a gun shop in Marseille.
"A mob ransacked the shop and got away with around eight hunting rifles," said a police spokesman in the southern city.
It comes as the UK Foreign Office has issued an alert on its website for Brits travelling to France.
It reads: "Since 27 June, riots have taken place across France. Many have turned violent. Shops, public buildings and parked cars have been targeted.
"There may be disruptions to road travel and local transport provision may be reduced. Some local authorities may impose curfews. The locations and timing of riots are unpredictable.
"You should monitor the media, avoid areas where riots are taking place, check the latest advice with operators when travelling and follow the advice of the authorities."
Firefighters in the Parisian suburb of Nanterre, where the shooting occurred Tuesday, extinguished blazes set by protesters that left scorched remains of cars strewn across the streets.
In the neighbouring suburb Colombes, protesters overturned bins and used them for makeshift barricades.
Looters last night broke into a gun shop and made off with weapons, and a man was later arrested with a hunting rifle, police said, and in the southern Mediterranean port city of Marseille, officers arrested nearly 90 people as groups of protesters lit cars on fire and broke store windows to take what was inside.
Buildings and businesses were also vandalized in the eastern city of Lyon, where a third of the roughly 30 arrests made were for theft, police said.
Authorities reported fires in the streets after an unauthorized protest drew more than 1,000 people earlier in the evening.
By about 3 a.m., Interior Minister Gerald Darmanin told cable news channel BFMTV that 471 arrests were made during the night.
The fatal shooting of the 17-year-old, who has only been identified by his first name, Nahel, was captured on video, stirring up long-simmering tensions between police and young people in housing projects and disadvantaged neighbourhoods.
