Sam's Story: Found in the building where the Captain is fighting off humanimals. Right before you slide down the pipe, check the window next to it. The note should be there.
We've been waiting for four months here, and it's been hell. We believe you are fine, the wave was stopped by the hills and couldn't reach the championship site, and that's the only thing that sustained us this far...
But we can't stay here any longer, your mom is getting worse, and I can't even find any clean drinking water for her.
The people from the Sub say they've got a proper hospital set up and their doctors can help her.
They'll come to pick us up in an hour or so, so please, when you read this letter, come find us at the dock, we'll be waiting