[Updated at 3:50 p.m. ET]
Under cross examination, Officer Smith said after Zimmerman was treated by paramedics, he was transported to the stateion. Zimmerman complained of feeling light-headed. Zimmerman was cooperative as he was taken into custody and as he was being walked to the patrol car, Zimmerman said, "I was yelling for help ..."
[Updated at 3:03 p.m. ET]
Smith testifies that he responded to a dispatch for a suspicious person and received report of "shots fired" while en route. He went through the security gate and arrived at the scene where it was dark and raining. He saw two people standing and one down on the ground. Zimmerman told the officer he was still armed, he turned his gun over and was handcuffed and placed in the rear of the patrol car while Ayala attended to Martin. In testimony, Smith identifies the gun used in the shooting.
[Updated at 2:39 p.m. ET]
Sanford Police Officer Timothy Smith is called to the stand.
[Updated at 2:38 p.m. ET]
On cross examination, Livingston says there were two other paramedics at the scene. One of them, who Livingston identified as Kevin O'Rourke, treated Zimmerman, whose nose was swollen. There was an abrasion on the left forehead. There was blood from inside the nose indicative of a nose injury. Zimmerman said he was dizzy but was able to stand on his own.
[Updated at 2:25 p.m. ET]
Prosecutor Guy has wrapped his direct examination. Now, defense attorney O'Mara is starting his cross-examination.
[Updated at 2:24 p.m. ET]
Zimmerman was also treated by Livingston.
"He had a very swollen, bleeding nose. He had lacerations to the back of his head," said Livingston. "We just tried to clean up his injuries so we could see them better."
She also saw two cuts on the back of his head, each approximately an inch long. They also cleaned up the cuts.
[Updated at 2:20 p.m. ET]
Livingston removed a can from Martin's sweatshirt. She also heard a small bag that made a "crinkling noise" but didn't move it. She saw a gunshot wound in his chest.
"We put on a cardiac monitor to access the heart rhythm. It was determined by the lead paramedic on the scene that the rhythm was incompatible with life," said Livingston.
Martin was pronounced dead at 7:30 p.m. Her unit didn't transport his body.
[Updated at 2:16 p.m. ET]
Livingston's unit was dispatched at 7:21 p.m. ET. She arrived about six minutes later and checked Martin for a pulse on his neck.
[Updated at 2:14 p.m. ET]
The prosecution has called Stacey Livingston to the witness stand. She's an EMT and firefighter for the Sanford Fire Department.
[Updated at 2:11 p.m. ET]
Zimmerman was compliant, according to Ayala, and he didn't disobey in any form. O'Mara has finished his direct examination. The witness has been excused.
[Updated at 2:08 p.m. ET]