I guess you can't read or don't read much.
Under oath:
Zimmerman told investigators he was returning to his vehicle after locating an address on Retreat View Circle when Martin approached him from his left rear and confronted him.
According to Zimmerman, Martin then punched him in the face, knocking him down, and began beating his head against the sidewalk.
Zimmerman said he called out for help while being beaten, and at one point Martin covered his mouth to muffle the screams.
According to Zimmerman's father, during the struggle while Martin was on top of Zimmerman, Martin saw the gun Zimmerman was carrying and said something to the effect of "You're gonna die now" or "You're gonna die tonight" and continued to beat Zimmerman.
Zimmerman and Martin struggled over the gun, and Zimmerman shot Martin once in the chest at close range. Zimmerman told police he shot Martin in
self-defense.
[
On June 26, 2012, the prosecution released the results of a voice stress test performed on George Zimmerman the day after the shooting.
Zimmerman was asked, "Did you confront the guy you shot?", to which Zimmerman answered, "No."
Zimmerman was asked, "Were you in fear for your life, when you shot the guy?", to which Zimmerman answered, "Yes."
The examiner concluded that Zimmerman "told substantially the complete truth" in the examination, and Zimmerman was classified as "No Deception Indicated (NDI)" according to the report.
https://en.wikipedia.org/wiki/Shooting_of_Trayvon_Martin#Background_of_the_shooting