"Across town" is a 3¾-hour drive.
More than you wanted to know:
http://patdollard.com/2012/03/was-trayvon-martin-a-drug-dealing-gangbanger/
What gets me is that if he was trespassing and totally innocent, he could have respectfully apologized to Zimmerman and asked which way was out of the neighborhood, excused himself, etc ...”Sir, I am SO sorry, we got a little lost ...can you please help me to find the exit out of this neighborhood? Thanks ...” there are many ways to be polite and not provoke someone if you are informed that you have been caught trespassing.
Not that he deserved to die over it, but certainly, his behavior, his posturing, etc. could have escalated the situation.
I know I’m stating the obvious here.