Special prosecutor Angela Corey has not indicated when she will decide whether to file charges against a neighborhood watch volunteer who shot 17-year-old Trayvon Martin to death.

Corey, assigned to oversee the investigation, announced Monday that she would not present the controversial shooting case to a grand jury. A grand jury set to convene Tuesday was canceled.

"The decision should not be considered a factor in the final determination of the case," Corey's office said.