BANGKOK — Ouk Mao, a Cambodian environmental journalist, was reporting on the continued logging of Prey Lang Wildlife Sanctuary when he was attacked on March 24 by a group of men he identified, including a former police officer. Mao, who has previously helped Mongabay to expose the destruction of a community forest in Stung Treng province, had been working for a local online news outlet and was traveling into the beleaguered wildlife sanctuary w…