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Story highlights George Zimmerman was injured from broken glass after a bullet flew through his truck The other man involved said Zimmerman had waved a gun, and he acted in self-defense

Zimmerman and Apperson have had tense encounters before. In September, Apperson accused the former neighborhood watch volunteer of threatening him in what Zimmerman's lawyer described as a "quasi-road rage incident."

Two days later, police stopped Zimmerman after Apperson called 911 to say he thought he saw Zimmerman near his office.

No charges were filed in either of those cases. But on Monday, Apperson allegedly fired a shot into Zimmerman's truck in Lake Mary, Florida. It's just the latest case involving Zimmerman, the man who fatally shot unarmed black teenager Trayvon Martin in 2012.

Exactly what happened Monday depends on which side you ask.

Zimmerman's attorney Don West said a man driving behind his client was flashing his lights and honking his horn at him.

"The man pulled up next to George yelling obscenities at him," West told CNN.

Zimmerman recognized Apperson as someone he had a problem with several months ago, the attorney said.

"He rolled his window up and he decided to get away, not to provoke it whatsoever," West said. "And the fellow followed him -- followed him around the U-turn and then pulled up to him and shot at him."

The bullet went through Zimmerman's side window and almost hit him in the head, West said. Zimmerman was hit by glass from the window, but not the bullet. He was taken to a hospital for minor injuries and then released, police said.

More here:
George Zimmerman injured after shooting - CNN.com