Washington v. Edwards
In Washington v. Edwards, 131 Wn. App. 611, 128 P.3d 631, 632 (2006), detective testimony concerning out-of-court statements by an informant was offered to show why the detective started his investigation. Id. at 614.
The Washington Court of Appeals ruled that the testimony was not relevant because the reason the investigation began was not in controversy, and furthermore that such evidence was inadmissible hearsay because the detective's "state of mind is not relevant to whether the defendant committed the crimes charged." Id. at 614-15.