there were 2 scenes as mentioned before after the credits.
sorry, i assumed automatically deanna was asking rick to end her husbands life so he doesn't turn. but watching that episode again, it seems rick was looking and facing directly at deanna and her husband. he turned around and fired the gun, which would probably mean he killed the alcoholic surgeon.
edit: the wiki said "Deanna was left shock, and crying yelling for his name, as Reg dies from getting chocked by his own blood. Enraged, she told Rick to execute Pete immediately"
http://walkingdead.wikia.com/wiki/Deanna_Monroe