In a closing argument filled with charts, graphs and other props, at one point George Zimmerman's defense attorney Mark O’Mara picked up a piece of concrete and placed it on the floor of Florida Circuit Court in Sanford as the trial in the shooting death of Trayvon Martin neared a close.

“That is cement,” O’Mara told the jury, after laying the large slab on the floor of the courtroom.

O’Mara argued that the cement on the sidewalk was Martin's weapon during a struggle between the unarmed black teen and Zimmerman that led to the 17-year-old being shot by the neighborhood community watchman.

“That is a sidewalk and that is not an unarmed teenager with nothing but Skittles trying to get home,” O’Mara said, summarizing the state’s case against Zimmerman. O’Mara argued that Martin was using the cement sidewalk as a weapon against Zimmerman as they fought on a Sanford street in February 2012.

“And the suggestion by the state that that’s not a weapon, that that can’t hurt somebody … is disgusting,” O’Mara said.

During his closing argument, O’Mara urged the jury not to let their emotions get in the way of justice.

“It is a tragedy, truly,” O’Mara said of Martin’s death. “But you can’t allow sympathy to feed into it.”

Zimmerman, 29, faces charges of second-degree murder and manslaughter in the teenager's death. Jurors are expected to be handed the case later on Friday.

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