Unless you have more to go on, I don't have any idea what that might be. The thing is that there are very few *drawn* things that can actually result in *jail time* in the USA. The closest thing I can think of is the case of Michael Diana, who did a crude zine/comic called Boiled Angel, and he was convicted on obscenity charges. Even then I don't think he did any actual jail time, he just had a lot of things like mandatory counseling and travel/child-contact restrictions imposed on him. I can't imagine what might be so vile that it overwhelms the whole free speech thing in the US and get someone in jail, unless it sparked an investigation that led to some other, non-comic related charge.