Just before the call cut off, she heard Trayvon Martin say, “Get off. Get off.”

[dkf]

15. This is interesting...

"Ryan also questioned the basic idea that the age of the person or persons screaming during the 45 seconds — and thus whether it was 17-year-old Martin or 28-year-old Zimmerman or both — can be determined by measuring frequency, or pitch.

“To my knowledge, there are no scientific studies of pitch as an indicator or anything else in a scream that would give someone confidence to say how old somebody was,” Ryan said.

When it comes to emotionally charged situations, especially a life-or death situation, the range of the human voice is simply too wide and varied to correlate it accurately to age, Ryan said.

A 28-year-old might scream like a 17-year old. A 17-year old might yell like a 28-year-old.

“The science doesn’t help with a recording like this,” Ryan said. “There isn’t anything to hang your hat on.”"