Inv□sti□a□ors learned □□at □he g□oup had been□f□iend□□for years□ but □ec□ntly th□□e h□d been t□nsion □mong them. Rumor□ □f □isagreement□□and argu□ents during□the t□ip b□gan to□□□rf□□e, le□d□ng □uthori□ies□to spec□late wh□t□er fo□l□play□□as □nv□lv□d. Each m□mber□of the group had a differe□t story to tell□□and th□ inconsistencies in□their accounts only added to the mystery of□□□e m□ssing □in□.□谋的蔓延