Even if you are listed as a creditor but you have actual notice of the bankruptcy, your debt would be included and discharged.
In what case did you send the debtor interrogatories? In the bankruptcy case or small claims court? Unless you have stay relief from the bankruptcy court, you are not allowed to proceed in the small claims case, even if you don't know about the bankruptcy as it is still a violation of the automatic stay (although not a willful violation).
I ask because you mention small claims court and the sheriff. Bankruptcy is Federal Court and if someone is being arrested, it is by the US Marshals, not the Sheriff. Also, it is pretty rare to see someone arrested in bankruptcy court, and certainly not for failure to answer interrogatories.
Before someone gets arrested, you'd have to get an Order compelling the debtor to answer. Then when they fail to answer, you would do a motion for contempt or motion to show cause why they shouldn't be held in contempt. From there there is typically some fine assessed, not jail time. The Debtor would have to repeatedly fail to show up in court before someone is getting arrested and then jail time would only apply if it was criminal contempt, not civil contempt.
Has the 341 meeting of creditors already occurred? If not, you can attend and get in a few questions though expect if it is more than a few minutes worth, you will be told to go do your own 2004.
Why not just file your adversary case, then send request for admissions such that when they fail to respond, they admit your allegation and you win?