You manage to locate a program that is controlling a receiver/transmitter mounted on the humvee. It seems that as well as the Tactical Location Display (TLD)*, the humvee is also sending a signal to an encrypted source, giving information on location, as well as information recieved from the TLD.
There's not much else on the humvee's computer.
*TLD=The pseudo-radar program that displays location of people. Technically, this shouldn't be possible without a dish of some sort, and you can't quite figure out how it's actually doing it.
"We don't know who the hell did it. It could be the government. It could be a rogue faction of the government. It could be some terrorist group. It could be anybody. It could be aliens for all we know at this point." Jeremy lights another cigarette. "Hopefully whatever that guy buried will give us some clues."