526 P.2d 361 THE STATE OF WASHINGTON, Respondent, v. JAMES EVERETT McFARLAND, Petitioner. No. 42929.The Supreme Court of Washington. En Banc. September 12, 1974. [1] Criminal Law — Evidence — Poison Tree Rule — Purpose. The purpose of the poison tree rule, under which evidence gained by illegal means must be suppressed, is to prevent […]