I had the pleasure of working on this Klaus model. I was mostly responsible for heavily re-working an existing ´clean´ model and adding wear, tear, blood and dirt to the textures.
Edgar tudela: https://www.artstation.com/edgartudela also assisted on this character!
As with all these zombie assets, expert feedback was given both internally by https://www.artstation.com/crazyhorse and from SHG by https://www.artstation.com/csabamolnar