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George Zimmerman Trial: Neighbor says she heard screams, saw "flailing" on night of deadly altercation

George Zimmerman, left, arrives in Seminole circuit court, with his wife Shellie, on the 11th day of his trial, in Sanford, Fla., Monday, June 24, 2013. Joe Burbank

(CBS) SANFORD, Fla. - A resident of the gated Florida community where former neighborhood watch captain George Zimmerman shot unarmed teen Trayvon Martin last year testified Tuesday she heard a voice yelling what may have been "no," and saw two people standing with their arms "flailing" the night of the altercation.

PICTURES: George Zimmerman crime scene photos

READ: Trayvon Martin Shooting: A timeline of events


"It sounded like running from the left to the right in the rear pathway," Selene Bahadoor said from the witness stand Tuesday afternoon.

She demonstrated the flailing in court, waving her arms and calling it "fast-paced."

Later, she said, she heard a gunshot and saw a "body in the grass... I remember it being face down," the Orlando Sentinel reported.

Zimmerman, 29, is on trial for second-degree murder in Martin's shooting death. Zimmerman claims he killed the teen in self-defense.

Defense attorney Mark O'Mara grilled Bahadoor, asking her whether she had ever told police about the running noises. "Could it be the first time you mentioned this new piece of evidence was just now as your just testified?," O'Mara said.

"I don't know if it was just today," Bahadoor said.

VIDEO: Zimmerman trial: Prosecutor opens with profanity

Also in court Tuesday, jurors heard testimony from a police sergeant who responded to the scene of the shooting.

Sanford police Sgt. Anthony Raimondo Raimondo said he saw Martin lying face-down, and attempted to test for a pulse.

He didn't detect one.

"I breathed for Mr. Martin," Raimondo said, responding to questions from prosecutor John Guy. "I tried to, sir."

The jury saw dramatic photos of Martin's body on the grass, the bullet wound in Martin's chest, and the body covered with the bright blanket. They also heard from a crime scene technician who showed them evidence, including Zimmerman's gun.

Complete coverage of the George Zimmerman-Trayvon Martin case on Crimesider

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