The owner of that vehicle, a 48-year-old West Philadelphia man, was soon joined by another man who also saw the crash and together they went looking for the driver.
They caught up with him several blocks away, at 64th Street and Grays Avenue, where his vehicle had broke down, said Lt. John Walker of Southwest Detectives.
Things began to go bad when the older man told the younger man to wait for police.
Walker said the younger man threw his keys at the older man, who responded by pulling out a .40-caliber Smith & Wesson pistol. The encounter ended after the two men struggled over control of the handgun, and the younger man was shot in his right arm. He was taken to the Hospital of the University of Pennsylvania.
Police said the wounded man, who lives on the 6500 block of Paschall Avenue, would be charged with driving under the influence and leaving the scene of an accident.
The older man, who has a permit to carry, called 911 and waited at the scene. He explained to the arriving officers what happened and handed them his pistol, Walker said. He was not immediately charged.
Contact Sulaiman Abdur-Rahman at email@example.com, or follow on Twitter @sabdurr.