Inve□tiga□□rs le□r□ed that t□e g□oup had b□en friends for years, but rec□nt□y□there had be□□ tensio□ □mon□ them. Rumors of disa□□ee□en□s and arguments□durin□ the trip beg□n□to □u□face□ leading authorities□to specu□ate whe□her foul pl□□ □□s invol□□d. Ea□h member□of□the g□o□p had a d□fferent story to tell,□and the inconsis□□ncie□ in their a□count□ □n□y a□□ed to th□□m□stery of the□missin□ ni□e.