□p>Inve□tigators lear□ed that the gro□p had been frien□s f□□□y□ar□, b□□ rec□n□□y there □ad been t□nsion among them. R□mor□ o□ disa□re□ments□and arguments d□ring □he trip began□□o surface, l□ading a□thorities □o spec□□ate whe□□er foul pl□y was □nvolved. Ea□□ mem□e□ of□the group had a differ□nt st□ry t□ tel□□ a□□ th□ inconsist□nc□es □n □heir a□counts on□y□added to the myst□□y of the missi□g □ine.