As national outrage builds over the shooting death of unarmed teenager Trayvon Martin in Florida, the state’s attorney general announced today that a grand jury will hear the case. Norm Wolfinger said that the state will use the grand jury “investigative resources” to figure out if criminal charges should be filed in the death of the 17-year-old. The Justice Department has also opened an investigation. Martin was allegedly shot by George Zimmerman, 28, a neighborhood-watch volunteer who claims that Martin looked “drugged” and attacked him. Meanwhile, Trayvon’s girlfriend, who was on the phone with him during the incident, told him to run away.