Thursday night, George Zimmerman’s brother, Robert Zimmerman Jr.,  stopped by Piers Morgan’s show to give his account of the fateful night that left 17-year-old Trayvon Martin dead.

According to Robert, his brother feared for his life and was being viciously beaten by the teen. Robert also claims Trayvon was attempting to take the gun from George, and his brother shot the youth in an attempt to save his own life–a story Zimmerman never told police.

Despite claims that he was being brutally beaten, ABC News obtained surveillance video taken shortly after the killing at the Sanford police station showing no blood or bruises on Zimmerman consistent with a life-threatening beating. But according to his brother, medical records will show that his brother suffered some injuries.

Many feel that the stories George Zimmerman’s brother and father have been telling are an attempt to mold George’s narrative to fit the facts. Although Zimmerman claims he was being viciously beaten, and according to his brother, one blow away from being brain damaged, he did not go to the doctor that night.

Robert Zimmerman Jr’s account also comes on the heels of a new witness coming forward who seems to contradict Zimmerman’s story.

On Thursday, CNN’s Anderson Cooper spoke with an unnamed witness who claims to have seen the shooting. According to the witness, they heard voices through a closed window, but later opened the window and heard someone aggressively yelling at another person. The witness said they saw two men on the ground, one on top of each other. He heard a yell for help, saw a scuffle and heard the gunshots.

The witness told Cooper that one of the men got up and didn’t appear hurt and walked toward him.

A special prosecutor, Angela Corey, has been assigned to the case and will be calling a grand jury into session on April 10. Until then, many will continue to call for the arrest of George Zimmerman.

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