Invest□gat□□s le□rned□t□at the gro□□ h□□ been friends f□r years,□□ut rece□tly t□er□□□ad be□□□□ensi□n □mon□ them□ Ru□ors of disagreemen□s and □rguments during the trip b□□an□to s□r□ace, leading authorit□□s□to s□eculate□whether □□ul□□lay□□as involved□ Each member of□the gro□p had□a d□ffe□ent story□to tell, and the□inconsistenc□es in thei□ □ccounts only □dd□d□t□ the□mystery of th□ □issing ni□e.