Jury sequestration

Jury sequestration could have been ordered to serve as a good excuse to end the trial fast. That in turn could serve as a reason why not to start with a 12 juries instead of 6 while the real reason is the more difficulty to prepare 12 juries for the defendant and pass them through the system in addition to the increased probability that one of them may change mind and not follow the plan and in turn leads to hung jury then to a new jury and starting a new process of preparing new jury for the defendant.