George Zimmerman (Getty Images)
(USA Today) -- Tests on the weapon used to kill Trayvon Martin show traces of George Zimmerman's DNA but none that matches the 17-year-old victim's.
Today, prosecutors released the results of the tests on the slide, trigger, grip and holster of the automatic pistol that Zimmerman used to kill the 17-year-old unarmed teenager in February in a gated community in Sanford, Fla.
To be precise, the tests excluded Trayvon as a possible contributor for DNA found on the gun's grip but were unable to determine whether his DNA was on the other parts of the weapon.
The tests on the slide showed the presence of one male individual, but it could not be matched to anyone.
Zimmerman, 28, a Neighborhood Watch volunteer, has admitted to shooting and killing Martin in February but says he did it in self-defense. He has told police that the pair struggled during a late-night confrontation on the dark streets of the residential community.
Zimmerman, who pleaded not guilty to a charge of second-degree murder, told police he opened fire only after Trayvon reached for the gun that he wore in a holster.
Other evidence released today includes a 911 call Trayvon's father, Tracy, made on the morning after the shooting.
During the three-minute 911 call, Martin's voice is low and sober as he tells the dispatcher that he last saw his son around 8:30 p.m. the night before.
"I need to file a missing person's report," he says. "It hasn't really been 24 hours, but I'm from Miami, and my son's up here with me, and he left. I'm in Sanford, and he doesn't know anybody up here."
Tracy Martin tells the dispatcher that he is staying at his girlfriend's house, spells Trayvon's name, then describes what his son might be wearing.
"He probably had on a pair of khaki shorts and a gray sweatshirt ... and a pair of Jordan tennis shoes, white and red tennis shoes," Tracy Martin says.
The father then gives the dispatcher a number where authorities can contact him.The operator tells him someone will be coming out to him.
The call ends without any mention of the shooting the night before.