he told the 911 dispatcher that he was pursuing. the dispathcher told him not to.
You are either intentionally obfuscating, or gravely mistaken.
The dispatcher did not tell him any such thing.
Dispatch told him he didn't need to do that, and Zimmerman abandoned his pursuit. He was headed back to his truck to wait for police. That's his story, anyway. The 911 tape corroborates tat. In other words, that's his "story" as events were transpiring, as well as afterward.
Have you considered a scenario where the tables are turned? Where Zimmerman, initially the pursuer, became the pursued?