Clearly you are the one here who has made up their mind without all the facts. Your agenda is showing.
There are only three named streets in the complex: Long Oak Way, Twin Trees and Retreat View Circle.
Zimmerman was close the clubhouse by the mailboxes which are on Twin Trees when he called the police. There is a short pathway there that runs between Twin Trees and Retreat View Circle. Midway on that pathway, between the two streets, there is a right turn that one can take. That long pathway runs behind the houses on Twin Trees and Retreat View Circle.
Zimmerman told the dispatcher that be thought the suspicious person was running towards the back entrance to the complex which is on Retreat View Circle.
It is logical to assume that Zimmerman followed on the short pathway from Twin Trees to Retreat View Circle where he would have a clear view to the back entrance and any fleeing suspicious person.
It would be illogical to assume that he had taken the long pathway that ran behind the buildings since they,the buildings, blocked any view of the back entrance.
Zimmerman first agreed to meet the police at the mailboxes and then ammended that --- asking them to call him when they arrived so he could tell them where he was. Why would he make that request unless he intended to continued his search for the suspicious person?
I might be completely off base but I think that on his way back to his vehicle, he decided to take a detour and check out that long pathway. That is where the killing took place. What was Zimmerman doing on that long pathway? How, when, why did he go on the long pathway?
If he had only stayed in his car, like he had been trained to do, none of this would have happened.