In□estigators learned tha□ th□ group □ad been friends for□year□□ but□recent□y th□r□ □ad been tens□on among □hem. Rum□r□□of□d□sagreemen□s a□d□arg□ments du□ing th□ t□ip□b□g□n□to □u□face, lea□ing authori□□es t□ speculate whether foul □lay w□s inv□lv□d. Each member o□ the □roup had a differen□ story□to□tel□, and the□in□onsistencies in□their accounts □nly added to □h□ my□tery of□the mis□□ng □□□e□