Updated

George Zimmerman, the neighborhood watch volunteer who has had a series of run-ins with girlfriends, his ex-wife and random strangers since killing an unarmed black teenager, narrowly missed getting shot Monday after a mysterious dispute.

The dispute this time was with the same man that authorities said was involved in a road rage incident with Zimmerman last year. A bullet missed his head, spraying glass from the vehicle's windshield, said his attorney, Don West. He said the bullet lodged somewhere in the vehicle. He was treated at a hospital and released.

No charges were immediately filed against either man.

Lake Mary Police Officer Bianca Gillett said during a news conference Monday that Matthew Apperson called 911 to report the shooting shortly after Zimmerman flagged down an officer to say someone had shot at him. Both Zimmerman and Apperson have yet to be interviewed formally by investigators, she said.

"We have not determined how or why the incident or altercation began," Gillett said.

A woman who answered the phone at the disability-benefits business where Apperson works asked a reporter never to call again. Nobody answered the door at his Winter Springs condominium, where there is a "for sale" out front and a lock box on the door.

Last September, Apperson said Zimmerman threatened to kill him, asking "Do you know who I am?" during a confrontation in their vehicles. Apperson decided not to pursue charges, and police officers were unable to move forward without a car tag identified or witnesses.

"I explained to Matthew that without the tag, witnesses, and/or clear video identifying the driver as George Zimmerman, it might be difficult to prove the alleged suspect was in fact Zimmerman," the Lake Mary police officer wrote in a report last September.

West said before the news conference that Zimmerman thought he knew who was responsible for the shooting and is cooperating with authorities.

George Zimmerman was involved in a road rage-related shooting Monday in Lake Mary, Florida.

According to WESH, the shooting involved two men and Zimmerman suffered a minor gunshot wound and was taken to a local hospital.

"The injuries are not serious," Lake Mary Deputy Police Chief Colin Morgan said.

A bullet missed Zimmerman's head, spraying glass from the vehicle's windshield, said his attorney, Don West. He said the bullet lodged somewhere in the vehicle. He was treated at a hospital and released.

No charges were immediately filed against either man.

Lake Mary Police Officer Bianca Gillett said during a news conference Monday that Matthew Apperson called 911 to report the shooting shortly after Zimmerman flagged down an officer to say someone had shot at him. Both Zimmerman and Apperson have yet to be interviewed formally by investigators, she said.

"We have not determined how or why the incident or altercation began," Gillett said.

"I don't know exactly what precipitated it, but another motorist pulled up alongside him and fired a shot at him," Zimmerman's attorney Don West said. "I believe that the window of the vehicle was broken.  As I understand it he was shot through the passenger window and the bullet narrowly missed his head and lodged the roof."

“[Zimmerman] walked normally into the ambulance, so he wasn’t being helped or nothing,” witness Ricardo Berrare told WESH.

Zimmerman was acquitted in 2013 of fatally shooting Trayvon Martin, an unarmed black teenager, in a case that sparked protests and national debate about race relations.

The Justice Department later announced it was not bringing a civil rights case against Zimmerman.

Since his acquittal, Zimmerman has had several brushes with the law.

Those include two incidents involving allegations of assault by girlfriends, and his wife claiming he smashed her iPad.

Charges were either dropped or not pursued because of a lack of evidence in those cases.

The Associated Press contributed to this report. 

Click for more from WESH.com.