Perhaps that's why the data went missing. It provides cover and a reason for Holder's people to understand why charges have to be dropped. It would simultaneously allow them to keep believing Saint Trayvon was murdered because Zimmerman hates black people.
I bet the GPS tracking shows him in many houses he wasn’t supposed to be in. He probably shot off a text right before the altercation, that said something like “Some cracker ass cracker is following me, I’m gonna go cill the muthaf’”