Ohio Evid.R. 606

(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

(1) Prohibited Testimony or other Evidence

Upon 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 jury's deliberations

or to the effect of anything upon that or any other juror's mind or emotions as

influencing the juror to assent to or dissent from the verdict or indictment or

concerning the juror’s mental processes in connection therewith. A juror’s affidavit

or evidence of any statement by the juror concerning a matter about which the juror

would be precluded from testifying will not be received by the court for these

purposes.

(2) Exceptions

A juror may testify about whether:

(a) Extraneous prejudicial information was improperly brought to the

jury’s attention;

(b) Any outside influence was improperly brought to bear on any juror;

or,

(c) Any threat, any bribe, any attempted threat or bribe, or any

improprieties of any officer of the court occurred.