Trayvon Martin's parents fight back tears as prosecutor describes final moments of their son's life.
(NBC News) Opening statements in the second degree murder trial against George Zimmerman are underway.
The former neighborhood watch volunteer has told police he killed 17-year-old Trayvon Martin in self defense.
Martin's parents fought back tears as prosecutor John Guy accused Zimmerman of "going after" and "shooting" their son.
"George Zimmerman did not shoot Travyon Martin because he had to. He shot him for the worst of all reasons, because he wanted to," Guy told the jury.
Zimmerman looked straight ahead, blinking regularly but showing little emotion.
The six female jurors will weigh those statements against a much different account from the defense.
""George Zimmerman is not guilty of murder, he shot Trayvon Martin in self defense after being viciously attacked," defense attorney Don West countered.
What's still unknown is if Zimmerman will take the stand.
Martin's parents are the only witnesses expected to testify being allowed inside the court room.
They say they're drawing strength from their son's memory.
The trial is expected to last two to four weeks.
Editor's note: George Zimmerman has sued NBCUniversal for defamation, and the company has strongly denied his allegations.
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