Carl Campbell, 33, was murdered as he sat in his car at a set of traffic lights in West Bromwich, West Midlands, just after Christmas last year.
Three men were convicted of murder last week and all face life behind bars when sentenced at Birmingham Crown Court tomorrow.
Gangster Mohammed Humza, 19, and his accomplices Jaspal Rai, 24, and Vikesh Chauhan, 24, targeted Mr Campbell on December 27.
The countdown to the killing began when Mr Campbell stole a Cartier watch which belonged to a man who 'worked for some very dangerous and influential drug dealers'.
Realising he had robbed a 'protected' man who had 'serious back-up'm Mr Campbell, from Wolverhampton, called Chauhan to apologise and offered to return the watch.
But as instructed by his gangland bosses Chauhan simply told Mr Campbell he could keep the watch adding ominously: 'Just hope that you live long enough to wear it.'
Days later preparations were made to exact revenge and a plan was hatched to scare Mr Campbell by shooting at his car.
The opportunity came when the killers discovered Mr Campbell was in West Bromwich town centre in a hired Ford Fiesta car driven by his friend Rakesh Kumar.
Fish spotted the Fiesta and pulled up next to it at traffic lights and Humza, known as H, fired five bullets at the car but the intention was not to kill.'
However, Mr Campbell died instantly in the hail of bullets when one of the shots ricocheted off the dashboard and hit him in the head.
The three killers were later spotted by a witness laughing, smiling and appearing 'quite happy with themselves' as they dumped the Audi in another part of the town.
Humza and Chauhan were arrested as they fled after abandoning the car while Rai tried to lie low abroad but was arrested in Belgium on January 8.