He can only be Penguin's father. It all makes sense now!
I wouldn't be too sure. Penguin's given us all a break since 7/7. That would either mean that Krusty's happy with us or the former got sent to his room or there is no "good" cop/bad cop - where by good I mean sort of "Danny Bonaduce at age 13" on the annoyometer and by "bad" I mean the unblinking wood shampoo, do not pass go, do not collect 200 bux (i.e., not name calling, just sayin').