George Zimmerman was involved in a road rage incident in Florida today with a man named Matthew Apperson -- and it wasn't the first time, police said.
In September 2014, the Associated Press reported that Apperson was stopped at a light in Lake Mary when a passenger in the car next to him started yelling, unprovoked.
The truck's driver, who Apperson believed to be Zimmerman, then reportedly said to Apperson, "Do you know who I am?"
Apperson pulled over, he said, and the truck followed him, blocking him in. Apperson claimed both men threatened to shoot and kill him, the AP reported.
Apperson said he called police, but the truck was gone when officers arrived.
Two days later, Apperson said he saw Zimmerman outside his office and was worried Zimmerman was waiting for him, the AP reported.
Apperson declined to press charges, the AP reported at the time.
However, this wasn't the last run-in between the two men: police confirmed today a second road rage incident involving Zimmerman and Apperson.
Earlier today, Zimmerman flagged down an officer in Lake Mary, saying someone shot at him and his car, said Bianca Gillet, a spokeswoman for the Lake Mary Police Department.
Zimmerman, 31, did not fire during the road rage incident, police said. The other driver, who police identified as Apperson, called 911 admitting he was the other person involved.
The investigation into today's shooting is ongoing, police said, and officers did not know if any charges will be filed.
In 2012, Zimmerman, a neighborhood watchman in Sanford, Florida, shot and killed 17-year-old Trayvon Martin.
Florida prosecutors tried to convict Zimmerman of state-level murder and manslaughter charges, but in July 2013 a jury acquitted him, saying prosecutors didn't have enough evidence to prove their case.
Federal prosecutors also concluded there was not sufficient evidence to prove Zimmerman intentionally violated Martin's civil rights.
The Associated Press contributed to this report.