The magic of true AI is the data wouldnt even need to be put into a data base, the system would be able to just view the data and process it itself. The algorithms would be basic but would learn and evolve over time theoretically. Another idea is that they would be so basic and open that both sides would actively try to influence the judgement. For example it weighs positive dna analysis more than it would weigh a witness testimony, so both lawyers would essentially try to bring hard evidence to the table rather than relying on witnesses who much of the time are flat out wrong or confused anyway.