Devastating blow to prosecution in Zimmerman case, prosecution's own witness says that Trayvon Martin was on top of Zimmerman beating him, Zimmerman was the one calling for help

CBS has a detailed discussion available here regarding Mr. Good's testimony.

From Fox News regarding another witness:

State witness Joe Manalo testified that he took the photos with his cell phone that showed blood on Zimmerman's lip and scalp.
"He had blood running down his nose from both nostrils and over his lips," Manalo told Prosecutor Bernie de la Rionda.
Manalo said Zimmerman asked him to call his wife, Shellie, and tell her that he just shot someone as cops arrived on the scene.
"He had a cell phone in his hand and he tossed it on the ground asking if I could call his wife," Manalo testified. "He gave me her number. I had a connection right away and said, 'Your husband has been involved in a shooting. He's detained by Sanford police.'" . . . .