"Look, I was just in prison on postal fraud charges? And that alone numbed me to it just because of temperamental inmate shit. Before the apocalypse even started."

You see enough people shanked, worry about it happening to you, you stop caring about people being killed outside of the times it's a massive inconvenience and the rarer time it's actually a friend. Even moreso when the zombies started.

(Murphy, understandably, doesn't have many friends. It's difficult to determine whether this is intentional or just a symptom of his deep personality flaws).

"I know they want people to fight for 'em but right now I just wanna feel as normal as I can. All two weeks of it before shit's due to go to hell." He says it in a way that there might be more wrong with him than just being red.