The shooting occurred at 1:40 p.m. Sunday while the cabbie's Toyota Camry was parked in the Kingsbridge Heights neighborhood.
Cesar Santos, 48, drove 2 young men to Sedgewick Avenue. One of them was captured on the cab's surveillance camera.
Investigators said the passengers ran off without paying. When Santos gave chase, one of them turned around and allegedly shot him in the torso. That blow would prove fatal.
Santos with his last breath told a fellow driver what had happened.
Police are searching for 2 Hispanic men, both 18 to 20 years old. One was wearing a white tank top and shorts. The other was also wearing a white tank and shorts and a Yankees baseball cap.
Eyewitness News is told Santos leaves behind a family that he was supporting in the Dominican Republic.
Authorities are asking anyone with information about the incident to call the department's CrimeStoppers hotline at 1-800-577-TIPS.
UPDATE: Crime Stoppers and the Mayor's Office are offering a $12,000 reward for the arrest and conviction of the individuals wanted for the fatal shooting of cab driver Cesar Santos.