Preacher Special: Saint of Killers #1

The story begins with an old man and a young guy sitting out on a park bench eating pizza. The young man's a mercenary of some sort and the old man asks him if he's heard the story of the greatest killer of them all... they called him the Saint of Killers. Thus begins the story of the man who'd become the Saint heading down home to get back to his house where his family and sick children live.