Family: Florida man didn't kill black teen in self-defense

Trayvon Martin, was shot to death by a neighborhood watchman in Sanford, Fla. (MyFoxOrlando)

SANFORD, Fla. -- The father of a black teenager killed by a white neighborhood watch volunteer says recently released 911 tapes debunk the shooter's claim of self-defense.

Tracy Martin, the father of 17-year-old Trayvon Martin, told The Associated Press on Saturday that the man who shot his son can be heard running and chasing the teen on the tapes. The neighborhood watch volunteer, George Zimmerman, tells a dispatcher that he is following Trayvon Martin. The dispatcher tells him he doesn't need to do that.

Tracy Martin asked: "How can you claim self-defense and you are the aggressor?"

The teen's family has said they are more convinced than ever that Zimmerman should be charged.

Trayvon Martin's mother, Sybrina Fulton, tells the AP that her son was frightened and was trying to run away from a stranger chasing him.