This is the original 5 page proposal by Robert Kirkman to +Image Comics
for The Walking Dead
. Based on feedback received, the beginning was altered to Rick waking up in the hospital. Also worth noting is that Lori was originally called Carol, and the story began in Pennsylvania, presumably Pittsburgh.
This and other nuggets of trivia can be found in the (full color!) The Walking Dead #1 - 10th Anniversary Edition
which was published in 2013 http://amzn.to/1LAfR0t