(_a_) confine the trial strictly to an expeditious hearing of the issues
raised by the charges;
(_b_) take strict measures to prevent any action which will cause
unreasonable delay, and rule out irrelevant issues and statements of any
kind whatsoever;
(_c_) deal summarily with any contumacy, imposing appropriate
punishment, including the exclusion of any defendant or his counsel from
some or all further proceedings, but without prejudice to the
determination of the charges.