A fourth man has been convicted for his part in the gang fight that led to the death of a teenage boy.

Nassem Galleze, 17, from Roundtable Road in Grove Park, died after the car he was in span out of control and crashed into a lamppost when a lump of concrete was thrown through the windshield.

He was taken to a south London hospital where he died later that day on September 26, 2015.

Three men were jailed last year for their involvement in the gang fight that led to the tragic crash.

Today, June 29, it was the driver of the car Gary Brown who was found guilty at the Old Bailey of causing death by dangerous driving.

Nassem had been in the car as a passenger that day in Frensbury Road in Brockley at 3pm when they were attacked by a group of youths from an opposing gang armed with weapons.

They had driven away to safety but then 22-year-old Brown turned around and returned in what the prosecution said was a deliberate effort to goad the rival gang.

The car was attacked again and they drove away, but then Brown, of Larkbere Road in Lewisham, returned and sped directly towards the gang.

This was when the concrete lump was thrown at the car, smashing the windscreen and sending it hurtling into a lamppost.

Nassem was found later by police slumped unconscious in the back seat.

Detective Chief Inspector Noel McHugh, of the Met Police's homicide and major crime command, said: "Brown could have driven away that day and not become involved in the dispute. But he made a deliberate decision to turn his car round several times and goad the youths in the street.

"He was seen speeding towards the opposing group, accelerating aggressively enough to make the car's wheels spin, and driving on the wrong side of the road, narrowly missing colliding with two buses at one point.

"His reckless actions had tragic consequences with the death of Naseem who was just 17.”

The three men previously convicted for their part in the fatal crash were jailed at Woolwich Crown Court on April 15, 2016. They were:

• Remi Moore, then 23, of Lea Bridge Road E10, was jailed for three years and four months for violent disorder.

• His bother Shiloh Moore, then 22, was also jailed for three years and four months for violent disorder.

• Tershan Thompson-Williams, then 22, of Seagar Place, Lewisham was jailed for two years and eight months for two counts of possession of a machete.

It remains unknown who threw the lump of concrete.

Det Ch Insp McHugh said: “Brown is the fourth man to be convicted in relation to this incident which remains under investigation.

“Our enquiries continue to identify the person who threw the concrete block and we would appeal for anyone with information, no matter how small, to contact us in confidence.

“As can been seen from today's conviction, we are determined to seek out and bring to justice all those who took part in this dreadful incident.”

Brown will be sentenced on a date to be set.