Terrified neighbors implored dispatchers to send police as a voice in the background screamed for help in 911 recordings released after the shooting of an unarmed Florida teen.

Trayvon Martin, 17, was returning from the store to the Sanford home of his father's fiancee when he has shot last month.

Authorities released seven 911 calls Friday, all of which describe hearing a gunshot.

The teen's parents broke down when they heard the recordings detailing the last moments of his life, said their attorney, Benjamin Crump.

"They are completely devastated, and they are in unbelievable grief," Crump told CNN affiliate WKMG.

Martin was carrying a drink and candy when George Zimmerman, a neighborhood watch captain, called 911 to report a suspicious man, authorities said.

The 911 dispatcher told Zimmerman not to confront him. But by the time police arrived, Martin lay dead with a gunshot wound in the chest, according to Sanford Police Chief Bill Lee.

911 tapes released Friday detail moments of terror in the neighborhood as residents made a flurry of calls describing a gunshot and a teen wailing for help.

In some of the recordings, a voice screams "Help, help!" in the background.

"There were gunshots right outside my house. There's someone screaming, I just heard a guy shot," a neighbor says. "Hurry up, they are right outside my house."

Recordings mirrored the same details: A man outside was crying for help, followed by the sound of a gunshot.

"Hurry please ... there's someone screaming outside," a neighbor whispers. "There's a gunshot, hurry up ... there's someone screaming. I just heard a gunshot."

In another call, a woman begs the dispatchers to send help, saying someone is "screaming and hollering" for help.