As an educational exercise for you, why don't you provide a reference for this claim.
Go ahead...try to find a reference that describes someone with any level of authority telling Zimmerman to "remain in his vehicle and not pursue".
I find myself wondering along with you what the f-— is going on with these people who keep repeating this BS claim. The sequence of events on the 911 tape is very clear. Why can’t they grasp it, I wonder?