<□>In□estigators □earn□d th□t the group ha□ been frie□ds fo□ yea□s□ b□t recently □he□e h□d been □ensi□□ amo□g t□em. Rumors of disag□eements□a□d□arguments during □he tr□p b□□a□ to surfa□e□ leading au□horities □o speculate□□het□□r foul p□ay was □nvolve□. Each me□□er o□ th□ group had a□differe□□ story to tell,□an□ t□□ inc□nsist□□cie□□□n their accou□ts only□□□□ed to the myste□y □f t□□ □issing□nine□