Why does it have to be lying or senile? Couldn't he just be wrong...or misquoted?

It was a written statement, no misquote.

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Did you see a copy of it?

The 911 report suggests that Zimmerman broke off his tail of Martin when the 911 operator told him to. Did he?
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Sure he did! Travon is in school today and has to go to work at 3pm. How anybody could be blind and ignorant to beleive that Zip-Gun-Zim "broke off" his tail is amazing.

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In the beginning of the call Zimmerman states two different times that Martin was approaching him, then ran and he lost sight of him. Which one of the two made the next contact after that is anyone's guess with what the public has to go on.

When all is said and done the truth will be what we already know by the 911 call. -- An armed vigilante followed an unarmed teenager against the instructions of the 911 dispatcher, a confrontation erupted (it doesn't matter who started it) and the armed vigilante killed the unarmed teenager.

That is what happened. No one can dispute it.

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A brilliant deduction with the luxury of hindsight. At what point did Zimmerman know Martin was unarmed?

Yeah it's contained in the link in Post # 1

"Statement of Robert Zimmerman, father of Neighborhood Watch volunteer:

“The tragic events of February 26 are..."

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A visual copy of the letter? I missed that...