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I think they're yelling help but i don't know. just send someone quick, please. >> okay. does he look hurt to you? >> i can't see him, i don't want to go out there, i don't know what's going on. >> they're coming. >> is he still yelling? >> yes. >> just gunshots. >> you just heard gunshots? >> yes. >> how many? >> just one. >> now, two audio experts for the state, for the prosecution, were going to testify saying that they had determined through their own techniques that those cries were not george zimmerman, they could not determine whose cries they were. they weren't saying it was trayvon ma...

Also a parent and a parent of a young boy who will be a teenager one day and my heart goes out to his parents and to his family. >> the orlando sentinel reports that two forensic audio experts have analyzed the 911 call and both said it could not be zimmerman on the 911 call pleading out for help. that has been a contentious point. trayvon martin's parents say they recognize their son calling out for help. demerman is claiming he fired in -- zimmerman is claiming he fired in self-defense. another point of controversy here as we wait for any possible arrest but no time table on the arrest yet. ...

>> did he lose mike? maybe we can get you back. for more on the story let me bring in michelle bernard from the bernard center for women, politics and public policy and e. steven collins who hosts "philly speaks" on wrnb. one of the questions surrounding the 911 calls made the night of the shooting is just who is heard screaming for help? let's listen. >> so you think he's yelling help? >> yes. >> all right. what is your -- >> there's gunshots. >> two forensic audio experts who analyzed the 911 calls for the orlando sentinel say the screams were not from zimmerman. one of the experts interview...

Of what's going to be a comprehensive investigation of everything that took place that night. >> did we lose michael? yep, we lost michael isikoff. thank you, michael, maybe we'll be able to get you back. for more on this story, let me bring you, and e. steven, one of the questions on the night of the shooting is just who is heard screaming for help. let's listen. >> help! >> you think he's yelling help? >> yes. >> what is your -- >> just -- there's gunshots. >> two forensic audio experts who analyzed the 911 calls for the orlando sentinel says those screens were not from zimmerman. one of tho...

>> i won't stop for my trayvon and for your trayvon. >> reporter: from the pulpits -- >> what do you want? >> justice. >> to the parks and practice fields, thousands gathered. during a weekend of rallies and protests filled with the same growing refrain. arrest the man who killed trayvon martin. >> nobody has the right to kill anybody. >> reporter: 28-year-old community watch volunteer george zimmerman says he shot and killed the unarmed teenager to save his own life during a fight. screams can be heard in this 911 call from a neighbor during the confrontation. his family and attorney have sai...