Defense winds down presentation at George Zimmerman's murder trial over teen's fatal shooting

Defense attorneys are finishing up their case in George Zimmerman's second-degree murder trial in central Florida.

Defense attorney Mark O'Mara says the defense could wrap up their presentation Wednesday.

Judge Debra Nelson still has to decide two issues.

The first is whether to grant a defense request to allow jurors to view an animation that depicts Zimmerman's fight with Trayvon Martin, the unarmed teenager who was fatally shot in February 2012 in a Sanford, Fla., gated community.

The other issue is whether she will allow Martin's text messages that purportedly deal with fighting.

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    Zimmerman is charged with second-degree murder. The former neighborhood watch volunteer is pleading not guilty, claiming he shot and killed Martin in self-defense.