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A makeshift memorial for Trayvon Martin is displayed Thursday, April 12, 2012, on the sidewalk outside the complex where Martin was shot dead by neighborhood watch volunteer George Zimmerman in Sanford, Fla. Zimmerman has been charged with second-degree murder in the shooting death of the 17-year-old and is expected in court Thursday. (AP Photo/Chris O'Meara)

A makeshift memorial for Trayvon Martin is displayed Thursday, April 12, 2012, on the sidewalk outside the complex where Martin was shot dead by neighborhood watch volunteer George Zimmerman in Sanford, Fla. Zimmerman has been charged with second-degree murder in the shooting death of the 17-year-old and is expected in court Thursday. (AP Photo/Chris O'Meara)

Shellie Zimmerman

The wife of George Zimmerman

pleaded not guilty on Friday, July 26, to a perjury charge after Florida

prosecutors alleged she lied about their family's finances during a bond

hearing in the case of her husband's shooting of black teenager Trayvon Martin.