According to Rialto police, the shooting occurred shortly after 5 p.m. Friday in the 200 block of West Jackson Street.
Investigators say the driver was shot multiple times, and then his car crashed into a fence outside a home in the 1000 block of North Willow Avenue.
Police found the driver slumped behind the wheel of the car. He was rushed to the hospital but died from his wounds.
The victim was later identified as Richard Santoscoy, said to be in his mid-40s.
Shortly before 5 a.m. Saturday, police arrested a suspect in the case. Investigators say the suspect and victim knew each other, and the shooting was not gang related.
The suspect, identified as Ingram Hoadena, was arrested at a relative's apartment in Rialto.