Sabrina Fulton, the mother of Trayvon Martin, says she will not rest until the man who shot and killed her unarmed son is arrested. “I can not eat, I can not sleep and I can not relax,” she told the Huffington Post. “Not until he’s arrested.” Trayvon, 17, was shot by George Zimmerman, a 28-year-old neighborhood-watch volunteer who has claimed self-defense. Fulton says the involvement of the U.S. Justice Dept. is heartening. “I truly believe they are going to arrest him,” she said. The Washington Post reports, however, that there is internal debate at the Justice Department and FBI over the appropriateness of federal charges.