Impossible..in no small measure because it never happened.
Where exactly did you gin up the idea that Zimmerman followed Martin in his car anyway?
You also failed to answer the basic question.. why did Martin, who had eluded Zimmerman and was supposed to be in fear of his safety, return at all?
Can we cross "Martin feared for his own safety" off the list of his possible motivations in the minutes before he was shot?
If you want to talk about this you really should read the PD transcripts and reports. Until then you just sound, well, stupid.