Gang members who pretended to be police officers to kidnap their victim and force him into a car fitted with blue lights have been jailed for more than 48 years.
The four-strong gang forced Pardeep Thandi into the fake police car as he stepped out of his home three days before Christmas.
They had fitted the Audi with lights to make it look like an undercover police car.
Neighbours thought the gang had killed him after they chased and battered him to the floor like a pack of dogs before putting him in the back of the black Audi.
They then demanded a ransom of more than £100,000 in calls to his elderly mother and relatives.
A court heard they threatened to kill her son and fired an imitation gun in the black Audi during the calls to back up their threats.
The intellectual ringleader of the gang, university student Conrad Jackson, 25, drove the fake police car joined by 25-year-old muscle man Reece Jackson.
The pair were working with inside man Amir Sahir, 29, who lived on the same street as the victim, and 30-year-old Zephan Rollins.
Sahir gave a go call the moment Mr Thandi stepped out of his home in Bromley, south east London, at about 11.20pm on December 22, 2016.
The men only gave up after a terrifying seven-hour abduction in the car which a court heard was fitted with a kidnap kit of stab vests, handcuffs, looped cable ties and an imitation firearm.
The victims blood was found on the imitation Olympic starter pistol, cable ties, on Conrads Jacksons stab vest and the pavement where he was abducted.
Conrad Jackson, who was in his third year studying business management at London Metropolitan University, was jailed for 15 years.
Reece Jackson was jailed for 12 and a half years and Sahir was jailed for 10 years.
Rollins was jailed for 11 years. He was said to be centrally involved with the blackmail shortly after being released to a bail hostel from a ten year sentence for a firearms offence.
The judge commended five officers from the Mets Modern Slavery and Kidnap Unit.
The gang was arrested and charged following a painstaking investigation of phone and forensic data despite Mr Thandi not giving evidence in the trial.
The gang even tried to claim that Mr Thandi had been in on the kidnap when he didnt give evidence.