Ada County Sheriff's Office Cold Case Detective Tim Cooper speaks at a podium during a press conference at the Ada County Sheriff's Office in Boise, Idaho, on September 23, 2026. Cooper announced that his investigation, although not complete, had connected Mathew Betkouski to the 1982 Tylenol poisoning deaths; Betkouski was found dead in the 1980s at Sacred Heart Catholic Church in Boise and had been known only as the "Unknown Wanderer.",Image: 1137676338, License: Rights-managed, Restrictions: *** World Rights *** US Newspapers Out *** NO TV, VIDEO, FILM ***, Model Release: no
