In the case of Ohler v. United States (529 U.S. 753 (2000)), Ohler was accused of selling drugs.  At trial, Ohler made an in limine motion to stop the prosecution from mentioning a prior drug conviction.  The Trial Judge denied the motion and said that the evidence was admissible under FRE 609(a)(1).  As a trial tactic, Ohler took the stand and admitted the previous conviction. Ohler was convicted of selling drugs, and tried to appeal based on the ruling that the prior conviction was inadmissible, but the US Supreme Court said that once a defendant admits a prior conviction in court, they forfeit the right to appeal the decision that the evidence was admissible.