SANFORD, Fla. - Key witnesses testified this morning in the George Zimmerman murder trial about what they heard and saw the night Zimmerman shot and killed Trayvon Martin.
Wednesday is the second full day of testimony in the case, starting with a former Olympic runner who reluctantly relived the terrifying night.
"I heard from my window like a pop, pop, pop," Jayne Surdyka explained to the jury.
Surdyka's testimony may become crucial to the state's case of 2nd degree murder.
From her bedroom window, Surdyka had a front row seat that February night to the scuffle between Zimmerman and Martin.
Prosecutors played her frantic 911 call.
"I don't know what's happening, someone's on the ground!" She told the 911 dispatcher.
"You see someone laying on the ground?" The dispatcher asked.
"I don't know. Someone has been shot. I don't know what's going on!" Surdyka said on the call.
The dispatcher tried to reassure her: "Well just calm down, stay on the line with me. Like I said, we have an officer on the scene."
Surdyka wiped away tears as she listened to the call, reliving the traumatic moment she witnessed.
Perhaps her biggest testimony for the state is not what she saw, but what she heard, describing the two voices arguing before the deadly shot.
She described one voice as aggressive, dominant, and from an older male, suggesting it was Zimmerman.
The other she said was high-pitched and sounded to be from a younger man, Martin.
"I truly believe, especially the second yell for help, it was a yelp. It was excruciating," she recalled to the jury. "I really felt it was the boy's voice."
In cross examination, the defense pinned her down, calling her statements assumptions.
"You also assumed that the aggressive voice, you heard was George Zimmerman?" Defense attorney Don West asked.
"Yes, because he was the man," she said.
"But you don't have any independent evidence of that, right?"
Surdyka's testimony does not help Zimmerman's claim of shooting in self defense after Martin pounded his head into the sidewalk.
Surdyka: "Sounded more like a boy to me."
Defense: "Or could it have been a man who has a higher voice?"
Surdyka: "It sounded like a boy to me."
Defense: "Of course, but it could have been a man with a higher voice?"
Surdyka: "I don't know."
Before testimony resumed on Wednesday, Judge Debra Nelson ruled that the jury will be allowed to hear the prior 911 calls he made about suspicious activity in the neighborhood.
The defense did not want the calls to be played.
The judge also announced that an alternate juror has been released for reasons "unrelated to the case."
Three alternate jurors remain.
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Southbound Dale Mabry is closed at Walnut Street (2 blocks north of I-275) after a pedestrian was hit by a fuel tanker Friday morning.