George Zimmerman, the self appointed neighborhood watch captain that shot and killed an unarmed teenager has claimed self defense since that night in late February. Video released by the Sanford Police Department, however, may cast serious doubts on his story based on a glaring lack of injuries in the moments immediately after the shooting occurred. In Zimmerman's original version of the story, he lost sight of Trayvon Martin after pursuing him briefly and was coming back to his SUV when the teen allegedly exploded out from behind him, knocking him down, punching him in the nose and then slamming his head to the concrete several times. Zimmerman claims to have drawn his gun in hopes of scaring Trayvon off, they struggled for it and the gun went off.

In the video, a calm and relaxed appearing Zimmerman exits the police car without any signs of physical trauma, including a bloodied shirt. Zimmerman says that he had been treated at the scene by EMTs. However, Zimmerman also claims that he had sustained a broken nose in the fight with Trayvon leading many to question why there was no blood evidence on his clothing that night.

The funeral director who handled Trayvon Martin's body also casts doubts on the Zimmerman story, saying there was no evidence of bruising or scraping, consistent with a fight on the teen's hands. His only injury that night was the fatal gun shot wound he sustained.

New and troubling evidence of Zimmerman's violent past has emerged as well. A former coworker described him as a person that could be okay one minute and then raging mad the next. Several instances of over aggression and violence led him to be fired from his position. From 2001-2005, Zimmerman had worked with two agencies, including one where his duties included securing houses during parties. He was fired because his hot temper made him a risk to have around. Also during the same period, there are at least three domestic violence instances on his record, including one that ended with his former fiancee asking for a restraining order.

In 2005, George Zimmerman called the police and then followed another driver who he said "spit" on his vehicle. The driver of the other car reported to the police that he had done so after getting fed up with Zimmerman's aggressive driving.

The homeowner's association in the gated community where Trayvon Martin was killed held an emergency meeting about Zimmerman in early March. One man had complained about Zimmerman following him and several others had had to call the police because of his behavior.