Did some clearing up with Photoshop, sure looks like it:
http://i52.tinypic.com/t03ryh.jpg
https://sites.google.com/site/elliottbartholow/_/rsrc/1291660612747/black-ops-zombies/gas-zombies/Crawler-Party_lrg.jpg :unsure:
The way I see it, it's probably a hoax. However. Louisiana is NOTORIOUS for hauntings, ghost stories, voodoo and even zombies. In my opinion, every story starts with a shred of truth. Does that mean it isn't faked? No. But who knows? Maybe it really is a zombie.

Also that picture and the one from the news site are two different pictures. *There is a leaf beside the knee on the news site and on the one you cleaned up there isn't.*-> I think anyway, hard to tell for sure.