Rule 606.        Competency of Juror as Witness

(a) At the Trial.  A member of the jury may not testify as a

witness before that jury in the trial of the case in which the

juror is sitting.  If the juror is called so to testify, the

opposing party shall be afforded an opportunity to object out

of the presence of the jury.

(b) Inquiry Into Validity Of Verdict Or Indictment. óUpon an

inquiry into the validity of a verdict or indictment, a juror may not

testify as to any matter or statement occurring during the course of

the juryís deliberations or to the effect of anything upon that or any

other jurorís mind or emotions as influencing the juror to assent to

or dissent from the verdict or indictment or concerning the jurorís

mental processes in connection therewith. But a juror may testify

about (1) whether extraneous prejudicial information was

improperly brought to the juryís attention, (2) whether any outside

influence was improperly brought to bear upon any juror, or (3)

whether there was a mistake in entering the verdict onto the verdict

form. A jurorís affidavit or evidence of any statement by the juror

may not be received on a matter about which the juror would be

precluded from testifying.