While clearing the prison Rick and Tyreese encounter a closed door to the cafeteria. When they burst in they find 4 other survivors, Dexter, Andrew, Axel and Thomas Richards.
They bring the rest of the group inside the cafeteria where they eat for the first time in quite a while. But unlike Rick's initial thought, the 4 new survivors reveal they are inmates not guards. Dexter, killed his ex-wife and her boyfriend; Andrew was a drug dealer; Axel committed armed robbery; Thomas Richards says "Tax Evasion". It is also implied that Dexter and Andrew are in a homosexual relationship. Then Dexter shows them around the prison, they reveal they had to use the freezer as bathroom after the buckets were all filled with excrement.
Robert Kirkman is an American comic book writer best known for his work on The Walking Dead and Invincible for Image Comics, and Ultimate X-Men and Marvel Zombies for Marvel Comics. He has also collaborated with Image Comics co-founder Todd McFarlane on the series Haunt. He is one of the five partners of Image Comics, and the only one of the five who was not one of its co-founders.
Photo: Comic book creator Robert Kirkman signing books and memorabilia for fans at the 2011 New York Comic Con, October 14, 2011. Photo author: Luigi Novi. Photo source: Wikimedia Commons.