A Brooklyn man named Julius Caesar was fatally shot in broad daylight by a gunman who has since been nabbed by police, authorities said Thursday.

The 31-year-old was in the passenger seat of a Ford Fusion sedan stopped at a red light on Union Street near Utica Avenue in Crown Heights around 5:40 p.m. Monday when the shooter, later identified by police as 24-year-old Terrell Winters, approached and began firing off shots, cops said.

Caesar was struck once in the head, while the 29-year-old man driving suffered a graze wound to the chest.

The driver then sped off en route a local hospital, but crashed the car just over a mile away at Midwood Street and Brooklyn Avenue, cops said.

The pair was rushed to Kings County Hospital, but Caesar could not be saved.

Winters was later arrested and charged with murder and criminal possession of a weapon.