In the final moments of his life, Trayvon Martin was being hounded by a strange man on a cellphone who ran after him, cornered him and confronted him, according to the teenage girl whose call logs show she was on the phone with the 17-year-old boy in the moments before neighborhood watch volunteer George Zimmerman shot him dead.

Martin's death Feb. 26 has stirred national outrage and protests, partly prompting the U.S. Justice Department's Civil Rights Division and the FBI to open an investigation into the case.

Florida State Attorney Norm Wolfinger announced today that he has ordered an "expeditious review" of the investigation conducted by the Sanford police department and that he would be "utilizing the investigative resources of the Seminole County Grand Jury which will be called to session" next month.

Martin family attorney Benjamin Crump held a news conference today detailing Trayvon Martin's phone call as he was followed, confronted and killed.

"The dots have all been connected. Arrested George Zimmerman for killing Trayvon Martin in killing in cold blood right now," Crump said.

"We don't understand how he's not arrested. The family worries that the more time passes it will be swept under the rug," the lawyer said.

ABC News was there exclusively as the 16-year-old girl told Crump about the last moments of the teenager's life.

"He said this man was watching him, so he put his hoodie on. He said he lost the man," Martin's friend said. "I asked Trayvon to run, and he said he was going to walk fast. I told him to run but he said he was not going to run."

Eventually he would run, said the girl, thinking that he'd managed to escape. But suddenly the strange man was back, cornering Martin.

"Trayvon said, 'What, are you following me for,' and the man said, 'What are you doing here.' Next thing I hear is somebody pushing, and somebody pushed Trayvon because the head set just fell. I called him again and he didn't answer the phone."

The line went dead. Besides screams heard on 911 calls that night as Martin and Zimmerman scuffled, those were the last words he said.

Trayvon's phone logs, also obtained exclusively by ABC News, show the conversation occurred five minutes before police first arrived on scene. The young woman's parents asked that her name not be used, and that only an attorney could ask her questions.

Martin's father, Tracey Martin, and mother, Sybrina Fulton, listened to the call along with ABC News, ashen-faced.

"He knew he was being followed and tried to get away from the guy, and the guy still caught up with him," Tracey Martin said. "And that's the most disturbing part. He thought he had got away from the guy and the guy back-tracked for him."

The teen was killed by Zimmerman while walking back to his father's fiancés home after stepping out to buy Skittles and some iced tea during the NBA All-Star Game. After weeks of relentless pressure, the Sanford Police have decided to release emergency and non-emergency calls placed during the incident.

"These a**holes always get away," Zimmerman says in a call to a non-emergency number.

Dispatcher: "Are you following him?"

Zimmerman: "Yeah."

Dispatcher: "We don't need you to do that."

An altercation soon ensued. A few moments later a torrent of 911 calls flooded in and Martin was killed by a single bullet. Zimmerman claimed self-defense and has yet to be arrested, stoking outrage and claims of prejudice against the police department.

"When George Zimmerman is arrested, tried and convicted I will get a little rest," Tracey Martin said.

Phone records that indicate the time of the girl's call with Trayvon Martin before his death.

According to a statement by the Justice Department, "The department will conduct a thorough and independent review of all of the evidence and take appropriate action and the conclusion of the investigation. … The government must prove beyond a reasonable doubt that a person acted intentionally and with the specific intent to do something which the law forbids. Negligence, recklessness, mistakes and accidents are not prosecutable under the federal criminal civil rights laws."

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