Authorities in Cambodia say they have closed a probe into missing Thai pro-democracy activist Wanchalearm Satsaksit, who was allegedly abducted in Phnom Penh four years ago. Wanchalearm was pushed into a black Toyota Highlander SUV on June 4, 2020, near the Mekong Gardens condominium, where he lived, eyewitnesses told VOA Khmer reporters at the time.…