Okla. Stat. tit. 63, § 63-5053.6: Service of subpoena - Limitation of actions - Burden of

proof - Res judicata.

A. A subpoena requiring the attendance of a witness at a trial

or hearing conducted under the Oklahoma Medicaid False Claims Act

may be served at any place in Oklahoma.

B. A civil action under Section 5053.2 of this title may not be

brought:

1. More than six (6) years after the date on which the

violation of the Oklahoma Medicaid False Claims Act is committed; or

2. More than three (3) years after the date when facts material

to the right of action are known or reasonably should have been

known by the official of the State of Oklahoma charged with

responsibility to act in the circumstances, but in no event more

than ten (10) years after the date on which the violation is

committed, whichever occurs last.

C. If the state elects to intervene and proceed with an action

brought under Section 5053.2 of this title, the state may file its

own complaint or amend the complaint of a person who has brought an

action under Section 5053.2 of this title to clarify or add detail

to the claims in which the state is intervening and to add any

additional claims with respect to which the state contends it is

entitled to relief. For statute of limitations purposes, any such

state pleading shall relate back to the filing date of the complaint

of the person who originally brought the action to the extent that

the claim of the state arises out of the conduct, transactions or

occurrences set forth, or attempted to be set forth, in the prior

complaint of the person.

D. In any action brought under Section 5053.2 of this title,

this state shall be required to prove all essential elements of the

cause of action, including damages, by a preponderance of the

evidence.

E. Notwithstanding any other provision of law, a final judgment

rendered in favor of this state in any criminal proceeding charging

fraud or false statements, whether upon a verdict after trial or

upon a plea of guilty or nolo contendere, shall estop the defendant

from denying the essential elements of the offense in any action

which involves the same transaction as in the criminal proceeding

and which is brought under the Oklahoma Medicaid False Claims Act.