Half a Mind

Multiple personalities have been well documented and studied. Protocols for re-unification have been published in many journals. Half a Mind is about a case where there can be no unification, and places those two consciousnesses into a legal situation of a murder trial. Here we explore some of the conundrums that would arise, including trial procedure, swearing in, giving testimony, witness protection, admissibility of evidence and more.
I think you'll find this fertile ground for a situation that could very well happen in real life, though it sounds far fetched.