ORLANDO, Fla. (AP) — George Zimmerman is suing NBC, claiming he was defamed when the network edited his 911 call to police after the shooting of Trayvon Martin to make it sound like he was racist.

The former neighborhood watch volunteer filed the lawsuit seeking an undisclosed amount of money on Thursday in Seminole County, outside Orlando.

The lawsuit claims NBC edited his phone call to a dispatcher last February. Zimmerman describes following Martin in the gated community where he lived, just moments before he fatally shot the 17-year-old teen during a confrontation.

NBC spokeswoman Kathy Kelly-Brown didn’t immediately return a phone call. Three employees of NBC or an NBC-owned television station lost their jobs because of the changes.

Zimmerman is charged with second-degree murder but has pleaded not guilty, claiming self-defense.