Generally a witness may not be impeached with evidence that they have been investigated or audited.{footnote}People v. Pratt, 759 P.2d 676, 681 (Colo. 1988) (audit of Medicaid irregularities by Social Services agency not proper subject for cross-examination of defense witness).{/footnote}  Cf. CHARACTER § 7.  Impeachment of Character Witnesses; CONVICTIONS.  See also ARRESTS; AUDITS; OTHER ACTS OR OCCURRENCES; PROSECUTION.
An exception has been recognized where a pending investigation creates the possibility of bias or interest.{footnote}Staton v. United States, 466 A.2d 1245 (D.C. 1983) (police detective testifying for defense properly cross-examined by prosecution as to pending internal investigation of her handling of case in which she was testifying).{/footnote}