More is being revealed about George Zimmerman, the man who shot and killed Florida teen Trayvon Martin, as a former CarMax colleague reportedly filed a formal complaint with management that he was being bullied daily by Zimmerman.

According to ABC News, the employee, an Arab-American, was a part-time worker in 2008 at the car dealership. The salesman asked to remain anonymous because he didn't want to be associated with Zimmerman's trial. However, he alleged he was the victim of months of serial hazing, pranks and ethnic insults directed by Zimmerman.

Zimmerman denied ever harassing his colleague. The salesman added that Zimmerman's denial was so convincing, when management approached him about the alleged incident, that he began doubting himself.

I would not be surprised if he got away with it [the Martin murder accusation], the colleague told ABC News. He's got, like you say, a good poker face. Great poker face. That pretty much summarizes this guy's personality. Great poker face.

Zimmerman, 28, is currently awaiting a second-degree murder trial for fatally shooting Martin, an unarmed 17 year old, on Feb. 26. He has pleaded not guilty to the murder charge and has been remanded in custody.

His defense team has filed a motion for a reasonable bond ahead of a hearing scheduled for Friday.

Investigators recently said Zimmerman passed two lie detector tests when he was questioned after Martin's killing. Zimmerman said that on the night Martin was shot he feared for his life and that he was acting in self-defense.

Investigators have said that Zimmerman could have avoided the confrontation if he had identified himself as a neighborhood watchman.