I am going on a limb and saying that he may not have had a good chance to actually look for one. Between being moved between jails and such he may not have had a stable place to meet for a consult and/or had time to research or set up an appt. Along with changing of judges. I wouldn't doubt if we hear shortly that he has hired someone.
Either he had no time, or, he is not in a good frame of mind (might be). I also assume that he doesn’t want to spend money on just any lawyer, and many good ones would refuse. It has to be one licensed to practice in the state of Indiana. Imagine how few want to deal with this whole situation, especially, in such a case, etc. At the same time, absence of a decent attorney, together with sealed pc affidavit, would inevitably raise questions about the legality of the whole process.
ETA. To add to regular reservations, the judge said that he and his family were threatened. I wonder if it might dishearten any person to be involved in this case?
And since I don’t quite know how attorneys work, I guess they have a license to practice in a certain state? But in the “Dream Team” of OJ Simpson, not everyone was from California? Or does someone need to have the license in the state (say, Indiana), but he can retain the counsel of lawyers out of state, if needed?