In□estigators l□arn□d tha□□□h□ group□had□be□n f□ie□ds□for years□ but recently□t□e□e had been te□sion□among them. Ru□□rs□of dis□g□e□□ents □n□ ar□uments during the t□ip began□to surf□□e, l□adi□g□a□th□rit□es to□speculate whether□foul pla□ w□s invol□ed.□E□□h member o□ th□ □roup h□□ □ □ifferent st□ry to tell,□and t□e inc□n□istencies□in□their accounts only adde□ to the myst□ry of the missing ni□□.□