A special prosecutor said she hoped to decide without a grand jury whether to arrest the 28-year-old man who killed 17-year-old Trayvon Martin in Sanford, Fla. \"I always lean towards moving forward without needing the grand jury in a case like this,\" Angela Corey told The Miami Herald. \"I foresee us being able to make a decision and move on it on our own.\" Corey, a state attorney in Jacksonville, Fla., was named special prosecutor in charge of the case by Florida Gov. Rick Scott last week, after growing protests and complaints by civil rights leaders and others that local authorities had botched the investigation. A county grand jury in Sanford was scheduled to hear the case April 10. Martin was walking through a gated community Feb. 26 when neighborhood watch volunteer George Zimmerman started following him and called a police dispatcher, describing Martin as suspicious. A few minutes later the two allegedly got into a fight that several neighbors reported hearing, and Zimmerman shot the suburban Miami teen once in the chest. Sanford police say he told them he acted in self-defense. Zimmerman alleged Martin approached him from the rear, exchanged words with Zimmerman and punched him in the nose, causing him to hit the ground. He alleged Martin slammed his head into the sidewalk. A police report on the incident said Zimmerman was bleeding from his nose and the back of his shaved head when officers arrived. Martin\'s family, along with prominent civil rights leaders and members of Congress, say Zimmerman\'s story doesn\'t add up and have demanded Zimmerman\'s arrest. Thousands of supporters have turned out at rallies across the country. A surveillance video aired by ABC News Wednesday indicates Zimmerman showed no signs of injury when he was marched into police headquarters the night of the shooting. The video shows Zimmerman, hands cuffed behind his back, stepping from a police cruiser, surrounded by several officers, walking through a door the night of Feb. 26 or early the following day, and then returning. No bruises or cuts are visible on his face or the back of his head and his shirt doesn\'t appear to have blood on it in the front or back. There does not appear to be grass or grass stains on his jacket, as the police report indicated. \"I think the video speaks for itself,\" family attorney Benjamin Crump said on CNN. \"You don\'t see any broken nose. You don\'t see any blood on his head. You don\'t see any stuff on the back of his clothes. You have to ask, why did this police chief, state attorney and now this acting police chief conspire to protect George Zimmerman for killing this unarmed teenager?\" Crump told CNN he considered the video \"the smoking gun,\" proving the self-defense allegation is not true. \"If this can\'t get him arrested, I don\'t know what can,\" Crump said.