The note can be found in Huntersville, on the top floor of the ruined house next to the playground.
I can hear them at the door, banging, trying to get inside. They've taken my father away, shot my mother, and now they're coming for me. West Tek and the military have turned our innocent town into something horrible. I don't know what they put into the air or the water, but everyone's sick - everyone's changing. It's too late for me. Get out now - get out while you can!