Kansas v. Ventris
With all of the decisions cited above (and others) as backdrop, the court issued a ruling in 2009 in a case from Kansas. While awaiting trial for robbery and murder, defendant Donnie Ray Ventris was placed into a cell with a police informant who was told to keep his ears open and listen for anything Ventris might reveal. Going further than instructed, the informant nudged Ventris into talking by telling him "something serious must be weighing on your mind." Ventris admitted shooting the victim and taking his property, and the informant reported this to police.
At trial, the prosecutor did not offer Ventris's admission in the case-in-chief, believing that the informant was closer to Henry's "incentivized stimulator than to Kuhlmann's "passive listening post," and that Ventris's statement would therefore be inadmissible under Massiah. Feeling that the statement should nevertheless be admissible to impeach under Harvey, the prosecutor called the informant to impeach Ventris's contrary trial testimony.
Ventris was convicted on some of the charges and appealed to the Kansas Supreme Court, which reversed the convictions and held that a statement taken in violation of the Sixth Amendment right to counsel could not be used for impeachment. Since this ruling conflicted with Harvey, the state appealed to the U.S. Supreme Court, conceding for purposes of argument that the Sixth Amendment was violated by the informant's actions. The Supreme Court reversed. Said the court:
"Our precedents make clear that the game of excluding tainted evidence for impeachment purposes is not worth the candle. The interests safeguarded by such exclusion are outweighed by the need to prevent perjury and to assure the integrity of the trial process. We hold that the informant's testimony, concededly elicited in violation of the Sixth Amendment, was admissible to challenge Ventris's inconsistent testimony at trial." (Kansas v. Ventris)