The 911 recordings have been released that depict how George Zimmerman pursued Trayvon Martin after police told him not to follow. On the NBC News' Today Show Martin's mother, Sybrina Fulton, commented on the situation saying her son was killed because Zimmerman was reacting to the color of his skin.

Martin's death has made national headlines as details of the situation continue to emerge.

Zimmerman was a self-appointed night watchman for a gated community in Sandford, Fla. He had spotted Martin inside the gated community premises.

This guy looks like he's up to no good or on drugs or something, Zimmerman told a 911 dispatcher, according to the New York Times. It's raining and he's just walking around, looking about. He's here now just looking at all the houses. Now he's just staring at me. He's coming to check me out. He's got something in his hands. I don't know what his deal is. Can you get an officer over here?

Zimmerman was waiting in his car, patrolling the gated community while Martin was walking to home of his father's girlfriend with a can of iced tea and skittles in his hand.

Zimmerman got out of the car with a licensed 9-millimeter pistol in his hand.

Are you following him? O.K., you don't need to do that, said the 911 dispatcher.

Martin allegedly ran as Zimmerman continued to follow him. The dispatcher told Zimmerman to wait for police, but he was allegedly anxious to keep following Martin.

Actually, could you have him call me and I'll tell him where I'm at, said Zimmerman.

Zimmerman caught up with Martin and two began to get into a physical altercation. Residents of the community called emergency services in order to report a disturbance. They heard and unknown voice yell for help.

A guy yelled, 'Help! Oh, my God,' one man told the dispatcher. There is two guys in the backyard with flashlights. There is a black guy down and it looks like he's been shot and he's dead.

Other witnesses reported similar events to 911.

There is somebody screaming outside, one female caller said. A male voice can be heard crying in the background, according to CBS. Then a shot is fired.

On the Today Show on Monday, Fulton told Matt Lauer that her son was trying to get away from Zimmerman.

He didn't know who this guy was, Fulton said. He was trying to just get away from the situation.

Lauer inquired whether Fulton could have been the aggressor in the situation.

No. He was never agitated, she said. He was mild-mannered. He was a nice kid.

Fulton implied that Zimmerman had seen the color of Martin's skin and attacked him because of it.

He was reacting to the color of his skin, she said. He committed no crime.

Sandford Police said that they have not uncovered enough evidence to dispute Zimmeran's claim that he acted in self-defense. The New York Times reported that Florida offers people who act in self-defense greater protection than most states. They are eligible to take action, if they believe there is reasonable fear that their lives are in danger.

That is the circumstance we are dealing with: If we arrest, we open ourselves to a lawsuit, Sgt. Dave Morgenstern, a spokesman with the Sanford Police Department, said. I would have to say I don't think we have conducted a racially biased investigation at all.

Morgenstern said that Zimmerman is cooperating with the investigation.

Zimmerman was previously arrested in 2005 on charges of battery on a police officer and resisting arrest. However, the charges were later dropped. Martin has a clean criminal record. But he was suspended from him Miami high school for 5 days in February, which was why he was in the community, visiting his father and his father's girlfriend.

Martin's parents along with their supporters, Representative Corrine Brown, a Florida Democrat, and Sanford's mayor, Jeff Triplett, are asking the FBI to take over the investigation.

We're not getting any closure, any answers, and it's very disturbing, said Tracy Martin, Trayvon's father, according WKMG. As a father, I'm hurt. I feel betrayed by the Sanford Police Department.

The family also started an online petition calling for the arrest of the Zimmerman.

I just want answers from the police department about what happened with my son, said Fulton, according to NPR.

Florida