Watch George Zimmerman trial June 28, 2013 (full videos)

On Friday, June 28, 2013, seven people testified in the George Zimmerman trial. Many felt that one of the prosecution's witnesses did more for the defense than the state of Florida. Zimmerman is charged with second-degree murder for the Feb. 26, 2012, shooting death of unarmed teenager Trayvon Martin. He faces life in prison if convicted.

Jurors heard testimony from Greg McKinney, a man who works with the video surveillance company that provides services to the Retreat at Twin Lakes, United
Security Alliance. He testified that the main gates's cameras weren't working and presented video footage that was 18 minutes off. Though something appears to walk past the clubhouse, there is no direct footage of the altercation between Zimmerman and Martin.

Next to testify was Jonathan Good. Good was a neighbor in the Retreat at Twin Lakes and an eyewitness to the fight. He described seeing two people in a vertical position fighting. He then saw as the two people began fighting on the ground. He called out what was going on and asked if he should call the police, he said no one responded to his calls. He did hear someone yell for help, but could not determine if it was the person on top or the bottom. He said that to the best of his recollection, the person on top wore dark clothing while the person on the bottom wore either white or red. Trayvon Martin wore a gray, hoodie sweatshirt while Zimmerman wore a bright orange jacket.

Next to testify was Jonathan Manolo. His wife, Jeanne Manolo testified on June 26, 2008. Manolo stated that he was the first to arrive at the scene and when he reached Zimmerman, he was standing talking on his cell phone. Martin was dead on the ground motionless. Manolo took photos of Zimmerman's injuries and Zimmerman told him that Martin was beating him and he had to shoot him. When Manolo asked if he should call 911, Zimmerman answered he had just called them. Manolo also took photos of Trayvon Martin's dead body.

Sanford Police officer Ricardo Ayala testified about his attempts to revive Trayvon Martin at the scene. The attempts were futile and Trayvon Martin was pronounced dead.

Stacey Livingston testified next. She is an EMT with Sanford Fire-Rescue and treated George Zimmerman at the crime scene. Upon arriving at the scene, she checked Trayvon Martin for signs of life, but found none. He was pronounced dead at 7:30 p.m. She testified about examining George Zimmerman and stated his wounds did not appear so serious that he needed to be transported to a hospital. There were several lacerations on his head but they weren't actively bleeding. She gave him a test to check for his responses and he scored perfectly. His nose was swollen, however and had a red spot on it.

Sanford Police officer Tim Smith was called to the stand. He stated he was the first officer to arrive at the scene. He made it to the complex a bit after 7 pm for a suspicious person call. By the time he found Zimmerman, Martin was already dead. Smith testified about the procedures used to question Zimmerman.

Last to testify was Lindzee Folgate. She is a physician assistant who treated George Zimmerman.