Let's complete the story here. The operator asked Zimmerman if he was following, Zimmerman said yes, and the operator said "we don't need you to do that."
Zimmerman replied "Okay." He then remained on the line for almost another two minutes, near the end of which he stated that he did not know where "this kid" went, and that he could not see him. There is no evidence on that recording that Zimmerman gave chase, and I'd encourage you to listen to it for yourself.
enough said