Why was Zimmerman even ON the phone with 911? Clearly, he wasn't heeding the advice of not following the potential perp, he wouldn't stay in one place and wait for an officer, he wasn't so intimidated that he avoided a confrontation by staying in his vehicle... Why? He was creating a recorded play by play of the warped reasoning behind his STALKING and KILLING of an unidentified scary person!
I mean, really, let's face it, he wasn't calling for help-- clearly. He wasn't accepting any.
His call tells us much more than he intended, imo.
He wasn't trying to get suggestions on his behavior from a dispatcher. He was trying to get LE out there, and quickly, to check out this guy he found suspicious.
Let me turn this around. If he intended to kill this guy in cold blood, why in the WORLD would he call the cops and ask for someone to arrive quickly?
He wouldn't.