Around Every Corner
When Lee and Kenny first hear about Crawford the community from Molly (and later Vernon (The Walking Dead) they find out the horrid truth of how Oberson ran it. No elderly, sick, medically disabled, and children were allowed into Crawford and if they were in it they were either thrown out or executed. Oberson wanted a perfect utopia where only the fittest could survive. A barrier of corpses and The Walkers blocked off Crawford from the rest of the town. They also tapped the whole city of all medical, food, mechanical and military supplies. When Lee and the whole group sneak in to look for supplies they found that all of Crawford had been overrun by Walkers after a pregnant woman stabbed a doctor and shot up the place. After they escape through the bell tower. When they reach the top they find Oberson as a Walker tied around a noose showing that he killed himself after trying to hang out in the bell tower after Crawford fell. He grabs Ben Paul and the player as Lee has the option to shoot and kill Oberson and save Ben or leave Crawford to kill him.
No Time Left
Although he doesn't appear in this episode he is mentioned several times.